Hi @IBN ,
I checked it in my test tenant and can also reproduce the error you mentioned. Actually not only the "Media bit rate" setting, I tried to change some other settings in the meeting policy and the error can be triggered as well:
Based on my experience, seems like it's probably a temporary backend issue and normally we can just just wait for a few days and then try again later.
Meanwhile, I went through the Service Health dashboard in my Microsoft 365 Admin center, but so far haven't seen a relevant issue listed on my end. So I just tried reporting it via the "Report an issue" button:
You can also report it in your MS365 Admin center or as indicated in the error message, try directly contacting the support via Microsoft 365 admin center > Support > New service request.
In addition, based on my test, changing the meeting policy via Teams Powershell is still working. So if you are in a hurry to change the Media bit rate, you can do it via Powershell:
1.Open PowerShell with elevated permissions.
2.Install-Module -Name MicrosoftTeams (if you have not previously)
3.Import-Module MicrosoftTeams (if you have not previously)
Connect-MicrosoftTeams Set-CsTeamsMeetingPolicy -Identity <PolicyIdentity> -MediaBitRateKb 60000
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