[Feature Request]: ArcBox - Add an explicit defaultOutboundAccess property to subnets in all templates avoid breaking scenarios

[sebassem]

Jumpstart Solution

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Feature Description

The latest announcement for deprecating default outbound internet access mentions that on September 2025 all new subnets created with new API versions will default to be private (meaning no default outbound internet access).

We should do the following to avoid any potential issue:

Proactively update API versions to the latest in all templates
Explicitly set the property defaultOutboundAccess to true to opt-out of this change
Currently we assign a public IP address to most virtual machines which shouldn't break internet access but if Bastion is used this might break the outbound internet access

Motivation

Avoid breaking JS scenarios after September 2025

Proposed Solution

No response

We need a URL

https://jumpstart.azure.com/azure_jumpstart_arcbox

Additional Context

No response

Code of Conduct

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