EXOAuthenticationPolicy: Recreate policy instead of changing it

[ricmestre]

Pull Request (PR) description

Unfortunately trying to change any existing EXOAuthenticationPolicy fails with the error message below, this is a problem in cmdlet ````Set-AuthenticationPolicy``` and the way to fix this is to just remove the current policy and recreate it with the new settings.

Object reference not set to an instance of an object.

This Pull Request (PR) fixes the following issues

• Fixes EXOAuthenticationPolicy: Cannot change resources #4819

[NikCharlebois]

Looping in PG folks responsible for the cmdlet.

//cc @Swatyario for visibility

[ricmestre]

By the way, other people already reported this issue, see https://techcommunity.microsoft.com/t5/windows-powershell/exchange-online-error-write-errormessage-object-reference-not/m-p/4127852

[NikCharlebois]

PG is aware of the issue and has it on their backlog. I recommend parking this until it's fixed since deleting and recreating will generate unnecessary entries in the audits.

[ricmestre]

Sure, just note that there are other EXO resources where this is also done, not sure if the Set cmdlets have issues or if don't exist though. I'll exclude this resource on our tool for now on deployments.

[FabienTschanz]

@NikCharlebois Any news on the situation? Is the PG still working on it or does it work now?

[NikCharlebois]

Haven't heard any updates from the team. Will go ahead and merge your proposed PR and will continue to track PG's response.

[ricmestre]

OK it's not the best solution but at least works, let me check the conflict and I'll update the branch

EDIT: You were faster than me thank you for checking the conflict :)