Issue updating "HideFromOutlookClients" and "HideFromAddressLists" with PATCH 1.0/Groups/{groupid}

Describe the bug

We have setup a PowerAutomate flow using the HTTP connector. For the last year or two this has been working solidly but recently we started getting the following response from the API request and it seems others have encountered this very recently also (see: https://learn.microsoft.com/en-gb/answers/questions/5696935/graph-api-bug-for-teams-creation-when-try-to-set-o?page=1&orderby=Helpful&translated=false#answers):
{
"error": {
"code": "ErrorInternalServerError",
"message": "An internal server error occurred. The operation failed., Value cannot be null. (Parameter 'tenant')",
"innerError": {
"date": "2026-01-12T13:18:07",
"request-id": "3ade4b7d-5094-4d08-adb5-af43882fccfd",
"client-request-id": "3ade4b7d-5094-4d08-adb5-af43882fccfd"
}
}
}

Expected behavior

The group is hidden from the GAL and is not discoverable from Outlook Clients

How to reproduce

PATCH 1.0/groups/{groupid}

Headers:
Authorisation Bearer {token}

Body:
{
"hideFromOutlookClients": true,
"hideFromAddressLists": true
}

SDK Version

No response

Latest version known to work for scenario above?

No response

Known Workarounds

N/A

Debug output

</details>


### Configuration

_No response_

### Other information

_No response_

No repository file or test is named in the report. Start by reproducing PATCH 1.0/groups/{groupid} with the supplied headers and body, then compare the internal-server-error response with the expected hidden Outlook and address-list behavior; done requires a confirmed resolution or a documented service-side cause.