diff --git a/README.md b/README.md
index 5042cd1..6eaf64c 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ Enter inside the folder zmbackup and execute the script install.sh. Follow the i
 
 ```
 $ zmbackup -v
-zmbackup version: 1.0.1
+zmbackup version: 1.1.0
 ```
 
 Open the folder /etc/cron.d/zmbackup.cron and adjust each job scheduled to the time you want the execution. If you configured zmbkpose or any old release before, please undo and use this file for scheduling.
diff --git a/etc/zmbackup.conf b/etc/zmbackup.conf
index e426f60..bb571c1 100644
--- a/etc/zmbackup.conf
+++ b/etc/zmbackup.conf
@@ -84,3 +84,9 @@ MAX_PARALLEL_PROCESS=3
 #               DEFAULT: 30
 
 ROTATE_TIME={ROTATE_TIME}
+
+# LOCK_BACKUP - Here you define if zmbackup should lock the backup session for only one
+#               for each day for each option.
+#               DEFAULT: TRUE
+
+LOCK_BACKUP=TRUE
diff --git a/src/zmbackup b/src/zmbackup
index 50179d8..dac52f9 100755
--- a/src/zmbackup
+++ b/src/zmbackup
@@ -36,7 +36,7 @@
 ################################################################################
 # zmbackup:
 #
-# 22/03/2017 - Version 1.0.2  - By Lucas Costa Beyeler
+# 13/04/2017 - Version 1.1.0  - By Lucas Costa Beyeler
 #                               <lucas.beyeler@4linux.com.br>
 #                               <lucas.costab@outlook.com>
 ################################################################################
@@ -58,33 +58,164 @@ export ALOBJECT="(objectclass=zimbraAlias)"
 export ACFILTER="zimbraMailDeliveryAddress"
 export DLFILTER="mail"
 export ALFILTER="uid"
+
+# PID FILE
+export PID='/opt/zimbra/log/zmbackup.pid'
+
 ################################################################################
 # LOAD CLASS FILES
 ################################################################################
-source /usr/local/share/zmbackup/*
+source /usr/local/share/zmbackup/validate
 
 ################################################################################
-# ZMBACKUP FUNCTIONS
+# PREPARATION FUNCTIONS
 ################################################################################
 
+# Load the config file and zimbra's bashrc
 load_config(){
   source /etc/zmbackup/zmbackup.conf
   source /opt/zimbra/.bashrc
 }
 
+export_functions(){
+  export -f load_config
+  export -f loop_ldap_backup
+  export -f loop_mbldp_backup
+  export -f loop_ldap_restore
+}
+
 # Create the temporary files
 create_temp(){
   export TEMPDIR=$(mktemp -d $WORKDIR/XXXX)
   export TEMPSESSION=$(mktemp)
-  export TEMPACCOUNT=$(mktemp)
+  export TEMPACCOUNT='/tmp/accounts.txt'
   export TEMPINCACCOUNT=$(mktemp)
 }
 
 # Clear all the temporary files
 clear_temp(){
-  rm -rf $TEMPSESSION $TEMPACCOUNT $TEMPINCACCOUNT $TEMPDIR
+  rm -rf $TEMPSESSION $TEMPACCOUNT $TEMPINCACCOUNT $TEMPDIR $PID
 }
 
+function build_backup_list()
+{
+  ldapsearch -x -H $LDAPSERVER \
+                -D $LDAPADMIN \
+                -w $LDAPPASS \
+                -b '' \
+                -LLL "$1" $2 | \
+                grep "^$2" | \
+                awk '{print $2}' > $TEMPINCACCOUNT
+  for i in $(cat $TEMPINCACCOUNT); do
+    EXIST=$(grep $i $WORKDIR/sessions.txt 2> /dev/null | tail -1 | awk -F: '{print $3}')
+    if  [[ "$i" != "galsync."* ]] && \
+        [[ "$i" != "virus-"* ]] && \
+        [[ "$i" != "ham."* ]] && \
+        [[ "$i" != "admin@"* ]] && \
+        [[ "$i" != "spam."* ]] && \
+        [[ "$i" != "zmbackup@"* ]] && \
+        [[ "$i" != "postmaster@"* ]] && \
+        [[ "$i" != "root@"* ]]; then
+      if [[ "$EXIST" = "$(date +%m/%d/%y)" ]] && [[ "$LOCK_BACKUP" == "TRUE" ]]; then
+        echo "WARN: $i already has backup today. Nothing to do."
+      else
+        echo $i >> $TEMPACCOUNT
+      fi
+    fi
+  done
+}
+
+build_restore_list()
+{
+  INBETWEEN=0
+  if [[ $2 == *"@"* ]]; then
+    for i in $(echo "$2" | sed 's/,/\n/g'); do
+      echo $i >> $TEMPACCOUNT
+    done
+  else
+    grep $1 /backup/sessions.txt | grep -v "SESSION" | cut -d: -f2 > $TEMPACCOUNT
+  fi
+  if [[ "$1" == "full-"* ]]; then
+    for i in $(egrep 'SESSION:' $WORKDIR/sessions.txt | egrep 'started' |  awk '{print $2}' | sort | uniq); do
+      if [[ "$1" ==  "$i" ]]; then
+        echo $i >> $TEMPSESSION
+        INBETWEEN=1
+      elif [[ "$INBETWEEN" -eq 1 ]] && [[ "$i" == "inc-"* ]]; then
+        echo $i >> $TEMPSESSION
+      else
+        break
+      fi
+    done
+  else
+    echo $1 >> $TEMPSESSION
+  fi
+}
+
+################################################################################
+# LOOP FUNCTIONS
+################################################################################
+
+loop_ldap_backup()
+{
+  load_config
+  ldapsearch -x -H $LDAPSERVER -D $LDAPADMIN -w $LDAPPASS -b '' \
+             -LLL "(&(|(mail=$1)(uid=$1))$2)" > $TEMPDIR/$1.ldiff
+  echo $SESSION:$1:$(date +%m/%d/%y) >> $TEMPSESSION
+}
+
+loop_mbldp_backup()
+{
+  load_config
+  if [ "$3" == "INC" ]; then
+    AFTER="\&query=after:"$(grep $1 $WORKDIR/sessions.txt | tail -1 | awk -F: '{print $3}')
+  fi
+  ldapsearch -x -H $LDAPSERVER -D $LDAPADMIN -w $LDAPPASS -b '' \
+             -LLL "(&(|(mail=$1)(uid=$1))$2)" > $TEMPDIR/$1.ldiff
+  wget --quiet -O $TEMPDIR/$1.tgz --http-user $ADMINUSER --http-passwd $ADMINPASS \
+        "https://$MAILHOST:7071/home/$1/?fmt=tgz"$AFTER --no-check-certificate
+  echo $SESSION:$1:$(date +%m/%d/%y) >> $TEMPSESSION
+}
+
+loop_ldap_restore()
+{
+  load_config
+  ldapdelete -r -x -H $LDAPSERVER -D $LDAPADMIN -c \
+              -w $LDAPPASS \
+              $(grep ^dn: $WORKDIR/$1/$2.ldiff \
+              | awk '{print $2}') > /dev/null 2>&1
+  ldapadd -x -H $LDAPSERVER -D $LDAPADMIN \
+           -c -w $LDAPPASS -f $WORKDIR/$1/$2.ldiff > /dev/null 2>&1
+}
+
+################################################################################
+# ZMBACKUP LIST SESSIONS
+################################################################################
+
+# List all the backups
+list_sessions ()
+{
+  for i in $(egrep 'SESSION:' $WORKDIR/sessions.txt | egrep 'started' |  awk '{print $2}' | sort | uniq); do
+    SIZE=$(du -h $WORKDIR/$i | awk {'print $1'})
+    QTDE=$(ls $WORKDIR/$i/*.ldiff | wc -l)
+    OPT=$(echo $i | cut -d"-" -f1 )
+    printf "\nSession: $i\n    Size: $SIZE"
+    printf "\nAccounts: $QTDE"
+    case $OPT in
+      "full") printf "\n    Type: Full Backup\n"
+      ;;
+      "inc") printf "\n    Type: Incremental Backup\n"
+      ;;
+      "distlist") printf "\n    Type: Distribution List Backup\n"
+      ;;
+    esac
+  done
+  echo ""
+}
+
+################################################################################
+# ZMBACKUP HELP
+################################################################################
+
 # show_help: It will show a quick help about each command from zmbackup
 show_help (){
   printf "Usage: zmbackup [-f] [options] <mail>"
@@ -125,6 +256,10 @@ show_help (){
   printf "\n\n\n"
 }
 
+################################################################################
+# ZMBACKUP MAIL NOTIFICATION
+################################################################################
+
 # Function to notify when the backup process began through e-mail
 notify_email_begin()
 {
@@ -174,120 +309,86 @@ notify_email_finish()
   rm -f "$TEMPSESSION"
 }
 
-# Search the LDAP for all accounts and backup an account inside a LDIFF file.
-# Parameters:
-# $1 -> Inform the LDAP query to search;
-ldap_bkp()
+################################################################################
+# ZMBACKUP BACKUP OPERATION
+################################################################################
+
+# Backup all the distribution lists and the accounts associated to them
+backup_dl()
 {
-  if [ -z $3 ]; then
-    ldapsearch -x -H $LDAPSERVER \
-                  -D $LDAPADMIN \
-                  -w $LDAPPASS \
-                  -b '' \
-                  -LLL "$1" $2 | \
-                  grep "^$2" | \
-                  awk '{print $2}' > $TEMPINCACCOUNT
+  export SESSION="distlist-"$(date  +%Y%m%d%H%M%S)
+  if [ -z $1 ]; then
+    build_backup_list $DLOBJECT $DLFILTER
   else
-    for i in $(echo "$3" | sed 's/,/\n/g'); do
-      echo $i >> $TEMPINCACCOUNT
+    for i in $(echo "$1" | sed 's/,/\n/g'); do
+      echo $i >> $TEMPACCOUNT
     done
   fi
-  for i in $(cat $TEMPINCACCOUNT); do
-    EXIST=$(grep $i $WORKDIR/sessions.txt 2> /dev/null | tail -1 | awk -F: '{print $3}')
-    if  [[ "$i" != "galsync."* ]] && \
-        [[ "$i" != "virus-"* ]] && \
-        [[ "$i" != "ham"* ]] && \
-        [[ "$i" != "admin"* ]] && \
-        [[ "$i" != "spam"* ]] && \
-        [[ "$i" != "zmbackup"* ]] && \
-        [[ "$i" != "postmaster"* ]] && \
-        [[ "$i" != "root"* ]]; then
-      if [ "$EXIST" = "$(date +%m/%d/%y)" ]; then
-        echo "WARN: $i already has backup today. Nothing to do."
-      else
-        echo $i >> $TEMPACCOUNT
-      fi
-    fi
-  done
-  if [ $? -eq 0 ]; then
-    if ! [ -s $TEMPACCOUNT ]; then
-      clear_temp
-      echo "Nothing to do.."
-      exit 0
-    fi
-    cat $TEMPACCOUNT | parallel --no-notice --jobs $MAX_PARALLEL_PROCESS \
-                              "ldapsearch -x -H $LDAPSERVER \
-                                             -D $LDAPADMIN \
-                                             -w $LDAPPASS \
-                                             -b '' \
-                                             -LLL '(&(|(mail={})(uid={}))$1)' > $TEMPDIR/{}.ldiff && \
-                               test '$2' == '$ACFILTER' || echo $SESSION:{}:$(date +%m/%d/%y) >> $TEMPSESSION"
+  if ! [ -s $TEMPACCOUNT ]; then
+    echo "Nothing to do"
   else
-    notify_email_finish "NOK" $SESSION
-    exit 1
+    notify_email_begin $SESSION
+    echo "SESSION: $SESSION started on $(date)" >> $TEMPSESSION
+    cat $TEMPACCOUNT | parallel --no-notice --env --jobs '$MAX_PARALLEL_PROCESS' \
+                                'loop_ldap_backup {} "$DLOBJECT"'
+    echo "SESSION: $SESSION completed in $(date)" >> $TEMPSESSION
+    mv "$TEMPDIR" "$WORKDIR/$SESSION" && rm -rf "$TEMPDIR"
+    cat $TEMPSESSION >> $WORKDIR/sessions.txt
+    echo "$(date) - Backup completed for all lists" >> $LOGFILE
+    notify_email_finish "OK" $SESSION
   fi
 }
 
-# Backup all the distribution lists and the accounts associated to them
-backup_dl()
-{
-  SESSION="distlist-"$(date  +%Y%m%d%H%M%S)
-  notify_email_begin $SESSION
-  echo "SESSION: $SESSION started on $(date)" >> $TEMPSESSION
-  ldap_bkp $DLOBJECT $DLFILTER $1
-  echo "SESSION: $SESSION completed in $(date)" >> $TEMPSESSION
-  mv "$TEMPDIR" "$WORKDIR/$SESSION" && rm -rf "$TEMPDIR"
-  cat $TEMPSESSION >> $WORKDIR/sessions.txt
-  echo "$(date) - Backup completed for all lists" >> $LOGFILE
-  notify_email_finish "OK" $SESSION
-}
-
 # Backup all the alias
 backup_alias()
 {
-  SESSION="alias-"$(date  +%Y%m%d%H%M%S)
-  notify_email_begin $SESSION
-  echo "SESSION: $SESSION started on $(date)" >> $TEMPSESSION
-  ldap_bkp $ALOBJECT $ALFILTER $1
-  echo "SESSION: $SESSION completed in $(date)" >> $TEMPSESSION
-  mv "$TEMPDIR" "$WORKDIR/$SESSION" && rm -rf "$TEMPDIR"
-  cat $TEMPSESSION >> $WORKDIR/sessions.txt
-  echo "$(date) - Backup completed for all alias" >> $LOGFILE
-  notify_email_finish "OK" $SESSION
+  export SESSION="alias-"$(date  +%Y%m%d%H%M%S)
+  if [ -z $1 ]; then
+    build_backup_list $ALOBJECT $ALFILTER
+  else
+    for i in $(echo "$1" | sed 's/,/\n/g'); do
+      echo $i >> $TEMPACCOUNT
+    done
+  fi
+  if ! [ -s $TEMPACCOUNT ]; then
+    echo "Nothing to do"
+  else
+    notify_email_begin $SESSION
+    echo "SESSION: $SESSION started on $(date)" >> $TEMPSESSION
+    cat $TEMPACCOUNT | parallel --no-notice --env --jobs '$MAX_PARALLEL_PROCESS' \
+                                'loop_ldap_backup {} "$ALOBJECT"'
+    echo "SESSION: $SESSION completed in $(date)" >> $TEMPSESSION
+    mv "$TEMPDIR" "$WORKDIR/$SESSION" && rm -rf "$TEMPDIR"
+    cat $TEMPSESSION >> $WORKDIR/sessions.txt
+    echo "$(date) - Backup completed for all alias" >> $LOGFILE
+    notify_email_finish "OK" $SESSION
+  fi
 }
 
 # Backup all the accounts - PARALLEL_SUPPORT
 backup_full()
 {
-  SESSION="full-"$(date  +%Y%m%d%H%M%S)
-  ldap_bkp $ACOBJECT $ACFILTER $1
-  echo "SESSION: $SESSION started on $(date)" >> $TEMPSESSION
-  notify_email_begin $SESSION
-  cat $TEMPACCOUNT | parallel --no-notice --jobs $MAX_PARALLEL_PROCESS \
-           "wget --quiet -O $TEMPDIR/{}.tgz \
-                 --http-user $ADMINUSER \
-                 --http-passwd $ADMINPASS \
-                 https://$MAILHOST:7071/home/{}/?fmt=tgz \
-                 --no-check-certificate && \
-            echo $SESSION:{}:$(date +%m/%d/%y) >> $TEMPSESSION"
-  mv "$TEMPDIR" "$WORKDIR/$SESSION"
-  echo "SESSION: $SESSION completed in $(date)" >> $TEMPSESSION
-  cat "$TEMPSESSION" >> $WORKDIR/sessions.txt
-  notify_email_finish "OK" $SESSION
-  echo "$(date) - Backup completed for all accounts" >> $LOGFILE
-}
-
-loop_inc()
-{
-  source /etc/zmbackup/zmbackup.conf
-  source /opt/zimbra/.bashrc
-  AFTER=$(grep $1 $WORKDIR/sessions.txt | tail -1 | awk -F: '{print $3}')
-  wget --quiet -O $TEMPDIR/$1.tgz \
-        --http-user $ADMINUSER \
-        --http-passwd $ADMINPASS \
-        https://$MAILHOST:7071/home/$1/?fmt=tgz\&query=after:$AFTER \
-        --no-check-certificate
-  echo $SESSION:$1:$(date +%m/%d/%y) >> $TEMPSESSION
+  export SESSION="full-"$(date  +%Y%m%d%H%M%S)
+  if [ -z $1 ]; then
+    build_backup_list $ACOBJECT $ACFILTER
+  else
+    for i in $(echo "$1" | sed 's/,/\n/g'); do
+      echo $i >> $TEMPACCOUNT
+    done
+  fi
+  if ! [ -s $TEMPACCOUNT ]; then
+    echo "Nothing to do"
+  else
+    echo "SESSION: $SESSION started on $(date)" >> $TEMPSESSION
+    notify_email_begin $SESSION
+    cat $TEMPACCOUNT | parallel --no-notice --env --jobs '$MAX_PARALLEL_PROCESS' \
+             'loop_mbldp_backup {} "$ACOBJECT"'
+    mv "$TEMPDIR" "$WORKDIR/$SESSION"
+    echo "SESSION: $SESSION completed in $(date)" >> $TEMPSESSION
+    cat "$TEMPSESSION" >> $WORKDIR/sessions.txt
+    notify_email_finish "OK" $SESSION
+    echo "$(date) - Backup completed for all accounts" >> $LOGFILE
+  fi
 }
 
 # Backup all the accounts - PARALLEL_SUPPORT
@@ -296,69 +397,38 @@ backup_incremental()
   #Check if exist a backup full. If not, do a backup full and not the incremental
   FULLSESSIONLABEL=$(grep "SESSION: full-" $WORKDIR/sessions.txt | tail -1 | awk '{print $2}')
   if [[ -z "$FULLSESSIONLABEL" && -d "$WORKDIR/$FULLSESSIONLABEL" ]]; then
+    echo "No Incremental Backup Found - Fall Back to Full Backup"
     backup_full $1
+    clear_temp
     exit
   fi
   export SESSION="inc-"$(date  +%Y%m%d%H%M%S)
-  ldap_bkp $ACOBJECT $ACFILTER $1
-  echo "SESSION: $SESSION started on $(date)" >> $TEMPSESSION
-  notify_email_begin $SESSION
-  export -f loop_inc
-  cat $TEMPACCOUNT | parallel --no-notice --jobs $MAX_PARALLEL_PROCESS \
-           "loop_inc {}"
-  mv "$TEMPDIR" "$WORKDIR/$SESSION"
-  echo "SESSION: $SESSION completed in $(date)" >> $TEMPSESSION
-  cat "$TEMPSESSION" >> $WORKDIR/sessions.txt
-  notify_email_finish "OK" $SESSION
-  echo "$(date) - Backup completed for all accounts" >> $LOGFILE
-}
-
-list_sessions ()
-{
-  for i in $(egrep 'SESSION:' $WORKDIR/sessions.txt | egrep 'started' |  awk '{print $2}' | sort | uniq); do
-    SIZE=$(du -h $WORKDIR/$i | awk {'print $1'})
-    QTDE=$(ls $WORKDIR/$i/*.ldiff | wc -l)
-    OPT=$(echo $i | cut -d"-" -f1 )
-    printf "\nSession: $i\n    Size: $SIZE"
-    printf "\nAccounts: $QTDE"
-    case $OPT in
-      "full") printf "\n    Type: Full Backup\n"
-      ;;
-      "inc") printf "\n    Type: Incremental Backup\n"
-      ;;
-      "distlist") printf "\n    Type: Distribution List Backup\n"
-      ;;
-    esac
-  done
-  echo ""
-}
-
-build_restore_list()
-{
-  INBETWEEN=0
-  if [[ $2 == *"@"* ]]; then
-    for i in $(echo "$2" | sed 's/,/\n/g'); do
+  if [ -z $1 ]; then
+    build_backup_list $ACOBJECT $ACFILTER
+  else
+    for i in $(echo "$1" | sed 's/,/\n/g'); do
       echo $i >> $TEMPACCOUNT
     done
-  else
-    grep $1 /backup/sessions.txt | grep -v "SESSION" | cut -d: -f2 > $TEMPACCOUNT
   fi
-  if [[ "$1" == "full-"* ]]; then
-    for i in $(egrep 'SESSION:' $WORKDIR/sessions.txt | egrep 'started' |  awk '{print $2}' | sort | uniq); do
-      if [[ "$1" ==  "$i" ]]; then
-        echo $i >> $TEMPSESSION
-        INBETWEEN=1
-      elif [[ "$INBETWEEN" -eq 1 ]] && [[ "$i" == "inc-"* ]]; then
-        echo $i >> $TEMPSESSION
-      else
-        break
-      fi
-    done
+  if ! [ -s $TEMPACCOUNT ]; then
+    echo "Nothing to do"
   else
-    echo $1 >> $TEMPSESSION
+    echo "SESSION: $SESSION started on $(date)" >> $TEMPSESSION
+    notify_email_begin $SESSION
+    cat $TEMPACCOUNT | parallel --no-notice --env --jobs '$MAX_PARALLEL_PROCESS' \
+             'loop_mbldp_backup {} "$ACOBJECT" INC'
+    mv "$TEMPDIR" "$WORKDIR/$SESSION"
+    echo "SESSION: $SESSION completed in $(date)" >> $TEMPSESSION
+    cat "$TEMPSESSION" >> $WORKDIR/sessions.txt
+    notify_email_finish "OK" $SESSION
+    echo "$(date) - Backup completed for all accounts" >> $LOGFILE
   fi
 }
 
+################################################################################
+# ZMBACKUP RESTORE OPERATION
+################################################################################
+
 restore_accounts_mail ()
 {
   build_restore_list $1 $2
@@ -369,12 +439,12 @@ restore_accounts_mail ()
     for i in $(cat $TEMPSESSION); do
       printf "\nRestoring Session - $i"
       if ! [ -z $3 ]; then
-        cat $TEMPACCOUNT | parallel --no-notice --jobs $MAX_PARALLEL_PROCESS \
+        cat $TEMPACCOUNT | parallel --no-notice --env --jobs '$MAX_PARALLEL_PROCESS' \
                  "curl --silent -k --data-binary @$WORKDIR/$i/{}.tgz \
                        -u $ADMINUSER:$ADMINPASS \
                        https://$MAILHOST:7071/home/$3/?fmt=tgz > /dev/null"
       else
-        cat $TEMPACCOUNT | parallel --no-notice --jobs $MAX_PARALLEL_PROCESS \
+        cat $TEMPACCOUNT | parallel --no-notice --env --jobs '$MAX_PARALLEL_PROCESS' \
                  "curl --silent -k --data-binary @$WORKDIR/$i/{}.tgz \
                        -u $ADMINUSER:$ADMINPASS \
                        https://$MAILHOST:7071/home/{}/?fmt=tgz > /dev/null"
@@ -385,18 +455,6 @@ restore_accounts_mail ()
   fi
 }
 
-loop_ldap()
-{
-  source /etc/zmbackup/zmbackup.conf
-  source /opt/zimbra/.bashrc
-  ldapdelete -r -x -H $LDAPSERVER -D $LDAPADMIN -c \
-              -w $LDAPPASS \
-              $(grep ^dn: $WORKDIR/$1/$2.ldiff \
-              | awk '{print $2}') > /dev/null 2>&1
-  ldapadd -x -H $LDAPSERVER -D $LDAPADMIN \
-           -c -w $LDAPPASS -f $WORKDIR/$1/$2.ldiff > /dev/null 2>&1
-}
-
 
 restore_accounts_ldap ()
 {
@@ -405,17 +463,20 @@ restore_accounts_ldap ()
     echo "No backup found. Impossible to restore"
   else
     echo "Restore LDAP process started at - $(date)"
-    export -f loop_ldap
     for i in $(cat $TEMPSESSION); do
       echo "Restoring Session - $i"
-      cat $TEMPACCOUNT | parallel --no-notice --jobs $MAX_PARALLEL_PROCESS \
-                                "loop_ldap $i {}"
+      cat $TEMPACCOUNT | parallel --no-notice --env --jobs '$MAX_PARALLEL_PROCESS' \
+                                "loop_ldap_restore $i {}"
       echo "Session $i restored with SUCCESS"
     done
     echo "Restore LDAP process completed at - $(date)"
   fi
 }
 
+################################################################################
+# ZMBACKUP MANUAL BACKUP ROTATION
+################################################################################
+
 rotate_backup()
 {
   cp $WORKDIR/sessions.txt $WORKDIR/sessions.txt.old
@@ -431,105 +492,143 @@ rotate_backup()
 }
 
 ################################################################################
-# MAIN CODE - HERE IS WHERE THE MAGIC HAPPENS
+# ZMBACKUP MAIN CODE
 ################################################################################
 
 validate
 load_config
+export_functions
 
 case "$1" in
   "-f"|"--full" )
-    create_temp
-    echo "Running the Full Backup - Please wait..."
-    case "$2" in
-      "-dl"|"--distributionlist" )
-        backup_dl $3
-      ;;
-      "-al"|"--alias" )
-        backup_alias $3
-      ;;
-      "-ldp"|"--ldap" )
-        ldap_bkp $3
-      ;;
-      * )
-        backup_full $2
-    esac
-    echo "Backup finished!"
-    clear_temp
+    if ! [[ -f "$PID" ]]; then
+      create_temp
+      echo "Running the Full Backup - Please wait..."
+      echo $$ > $PID
+      case "$2" in
+        "-dl"|"--distributionlist" )
+          backup_dl $3
+        ;;
+        "-al"|"--alias" )
+          backup_alias $3
+        ;;
+        "-ldp"|"--ldap" )
+          ldap_bkp $3
+        ;;
+        * )
+          backup_full $2
+      esac
+      echo "Backup finished!"
+      clear_temp
+    else
+      echo "There is an already instance of zmbackup running in background."
+      echo "As a secure measurement, only one instance of zmbackup should be running"
+      echo "at this moment."
+      echo "If you are sure that this is the only instance running, please remove"
+      echo "the file /opt/zimbra/log/zmbackup.pid and try again."
+      echo "Manually removing the zmbackup.pid could cause data inconsistence."
+    fi
   ;;
   "-i"|"--incremental" )
-    create_temp
-    echo "Running the Incremental Backup - Please wait..."
-    backup_incremental $2
-    echo "Backup finished!"
-    clear_temp
+    if ! [[ -f "$PID" ]]; then
+      create_temp
+      echo "Running the Incremental Backup - Please wait..."
+      backup_incremental $2
+      echo "Backup finished!"
+      clear_temp
+    else
+      echo "There is an already instance of zmbackup running in background."
+      echo "As a secure measurement, only one instance of zmbackup should be running"
+      echo "at this moment."
+      echo "If you are sure that this is the only instance running, please remove"
+      echo "the file /opt/zimbra/log/zmbackup.pid and try again."
+      echo "Manually removing the zmbackup.pid could cause data inconsistence."
+    fi
   ;;
   "-l"|"--list" )
     list_sessions
   ;;
   "-r"|"--restore" )
-    create_temp
-    case "$2" in
-      "-dl"|"--distributionlist" )
+    if ! [[ -f "$PID" ]]; then
+      create_temp
+      case "$2" in
+        "-dl"|"--distributionlist" )
+          if [ -z "$3" ]; then
+            show_help
+            printf "\n\nError! Please inform the session that should be restored\n\n"
+          else
+            restore_accounts_ldap $3 $4
+          fi
+        ;;
+        "-al"|"--alias" )
+          if [ -z "$3" ]; then
+            show_help
+            printf "\n\nError! Please inform the session that should be restored\n\n"
+          else
+            restore_accounts_ldap $3 $4
+          fi
+        ;;
+        "-ldp"|"--ldap" )
         if [ -z "$3" ]; then
           show_help
           printf "\n\nError! Please inform the session that should be restored\n\n"
         else
           restore_accounts_ldap $3 $4
         fi
-      ;;
-      "-al"|"--alias" )
+        ;;
+        "-ro"|"--restoreOnAccount" )
+        if [ -z "$3" ] || [ -z "$4" ] || [ -z "$5" ]; then
+          show_help
+          printf "\n\nError! Please inform the session, the account that should be restored, and when the restore should be placed.\n\n"
+        else
+          restore_accounts_mail $5 $3 $4
+        fi
+        ;;
+        "-m"|"--mail" )
         if [ -z "$3" ]; then
           show_help
           printf "\n\nError! Please inform the session that should be restored\n\n"
         else
-          restore_accounts_ldap $3 $4
+          restore_accounts_mail $3 $4
         fi
-      ;;
-      "-ldp"|"--ldap" )
-      if [ -z "$3" ]; then
-        show_help
-        printf "\n\nError! Please inform the session that should be restored\n\n"
-      else
-        restore_accounts_ldap $3 $4
-      fi
-      ;;
-      "-ro"|"--restoreOnAccount" )
-      if [ -z "$3" ] || [ -z "$4" ] || [ -z "$5" ]; then
-        show_help
-        printf "\n\nError! Please inform the session, the account that should be restored, and when the restore should be placed.\n\n"
-      else
-        restore_accounts_mail $5 $3 $4
-      fi
-      ;;
-      "-m"|"--mail" )
-      if [ -z "$3" ]; then
-        show_help
-        printf "\n\nError! Please inform the session that should be restored\n\n"
-      else
-        restore_accounts_mail $3 $4
-      fi
-      ;;
-      * )
-        show_help
-        printf "\n\nError! Incorrect options\n\n"
-      ;;
-    esac
-    clear_temp
+        ;;
+        * )
+          show_help
+          printf "\n\nError! Incorrect options\n\n"
+        ;;
+      esac
+      clear_temp
+    else
+      echo "There is an already instance of zmbackup running in background."
+      echo "As a secure measurement, only one instance of zmbackup should be running"
+      echo "at this moment."
+      echo "If you are sure that this is the only instance running, please remove"
+      echo "the file /opt/zimbra/log/zmbackup.pid and try again."
+      echo "Manually removing the zmbackup.pid could cause data inconsistence."
+    fi
   ;;
   "-d"|"--delete" )
   if [ -z "$2" ]; then
     show_help
     printf "\n\nError! Please inform the session that should be deleted\n\n"
   else
-    rotate_backup $2
+    if ! [[ -f "$PID" ]]; then
+      rotate_backup $2
+    else
+      echo "There is an already instance of zmbackup running in background."
+      echo "As a secure measurement, only one instance of zmbackup should be running"
+      echo "at this moment."
+      echo "If you are sure that this is the only instance running, please remove"
+      echo "the file /opt/zimbra/log/zmbackup.pid and try again."
+      echo "Manually removing the zmbackup.pid could cause data inconsistence."
+    fi
   fi
   ;;
   "-h"|"--help" )
     show_help
   ;;
   "-v"|"--version" )
-    echo "zmbackup version: 1.0.2"
+    echo "zmbackup version: 1.1.0"
   ;;
   * )
     show_help
diff --git a/src/zmbackup-share/zmbackup-validate-config-file b/src/zmbackup-share/validate
similarity index 98%
rename from src/zmbackup-share/zmbackup-validate-config-file
rename to src/zmbackup-share/validate
index 2d5c62c..02d6cd6 100644
--- a/src/zmbackup-share/zmbackup-validate-config-file
+++ b/src/zmbackup-share/validate
@@ -20,7 +20,7 @@
 # USA
 #
 ################################################################################
-# zmbackup-validate-config-file:
+# validate:
 #
 # 13/03/2017 - Version 1.0 -  By Lucas Costa Beyeler
 #                             <lucas.beyeler@4linux.com.br>