Get-MgUser fails for a tenant with a large number of users, but Get-MgUser -All -PageSize 400 succeed.

[mr-oliva]

I create a test tenant with 40,000 users.

Using PowerShell 5.1, "Get-MgUser -All" causes the StackOverflowExeption.
Given the related issue (#949), This result is to be expected.

Howerver, "Get-MgUser -All -PageSize 400" succeed.

Why does it work with large PageSize ?

The result of verification is as follows:

PS C:\Users\kutsu> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      5.1.22000.593
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.22000.593
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1


PS C:\Users\kutsu> (Get-MgUser -All -PageSize 400).count
40002
PS C:\Users\kutsu> (Get-MgUser -All).count

Process is terminated due to StackOverflowException.

[peombwa]

Thanks for bringing this to our attention. We are investigating the root cause of this error as it is isolated to PowerShell 5.1.

[peombwa]

We've traced the bug to a recursion depth issue in PS 5.1 when there are more than ~250 pages to be fetched. Thanks, @mr-oliva, and the team, for the memory dumps.

The workaround is to increase the -PageSize to something like Get-MgUser -All -PageSize 400 to reduce the number of pages or upgrade to PowerShell 7.x.

We will provide a fix in the upcoming release.

[peombwa]

A fix will be provided by Azure/autorest.powershell#932.

[mr-oliva]

I'm sorry for my late response and understand that there is a problem.
Thank you for check this issue.
I'll try again after update autorest.powershell.