Failed to execute GetThreadRosterAsync

[carles-unibas-ch]

Describe the bug

upgrade version from 2.26.1 to 2.27.0 errors our automation.

Get-MgTeamChannelMember error: Failed to execute GetThreadRosterAsync. Status: 403 (Forbidden) ErrorCode: Forbidden Date: 2025-04-24T11:30:39 Headers: Vary : Accept-Encoding Strict-Transport-Security...

Expected behavior

Get-MgTeamChannelMember OK

How to reproduce

• Execute

Install-Module -Name "Microsoft.Graph.Teams" -Scope CurrentUser -Force -ErrorAction Stop -Confirm:$FalseImport-Module -Name "Microsoft.Graph.Teams" -Scope Local -Force -ErrorAction Stop
Get-MgTeamChannelMember -TeamId "XXX" -ChannelId "YYY"

• see error
• Execute

Install-Module -Name "Microsoft.Graph.Teams" -Scope CurrentUser -Force -ErrorAction Stop -Confirm:$False -RequiredVersion 2.26.1
Import-Module -Name "Microsoft.Graph.Teams" -Scope Local -Force -ErrorAction Stop -RequiredVersion 2.26.1
Get-MgTeamChannelMember -TeamId "XXX" -ChannelId "YYY"

• no error

SDK Version

2.27.0

Latest version known to work for scenario above?

2.26.1

Known Workarounds

Use stable version:

Install-Module -Name "Microsoft.Graph.Teams" -Scope CurrentUser -Force -ErrorAction Stop -Confirm:$False -RequiredVersion 2.26.1
Import-Module -Name "Microsoft.Graph.Teams" -Scope Local -Force -ErrorAction Stop -RequiredVersion 2.26.1
Get-MgTeamChannelMember -TeamId "XXX" -ChannelId "YYY"

Debug output

raw.log

Click to expand log

```

</details>


### Configuration

_No response_

### Other information

_No response_

[grantemsley]

I also see the exact same error when calling the Uri for that API directly with version 2.27.0

Invoke-MgGraphRequest -Uri https://graph.microsoft.com/v1.0/teams/<team_id>/channels/<channel_id>/allMembers gives 403 error "Failed to execute GetThreadRosterAsync".

Using the similar Invoke-MgGraphRequest -Uri https://graph.microsoft.com/v1.0/teams/<team_id>/channels/<channel_id>/members works perfectly though.

[ryanreckard]

I have the same exact issue in GCC High

[jolscr]

Same issue here : https://github.com/microsoftgraph/msgraph-sdk-powershell/issues/3321