Teams has started displaying some Microsoft Adverts for What's New in Teams and Conferences. This can be annoying to users who just want to use Teams. The latest version of MicrosoftTeams PowerShell has introduced a methods of disabling those messages from being displayed.

To do so first ensure your MicrosoftTeams PowerShell module is v6.1 or higher:

get-module MicrosoftTeams

To update the PowerShell module use command: Update-Module MicrosoftTeams -RequiredVersion 6.3.0 -Force

If updated then restart PowerShell and run the following:

Get-CsTeamsUpdateManagementPolicy -Identity Global

Check what is returned for DisabledInProductMessages

To set run the folowing:

[array]$DisabledMessages = "edf2633e-9827-44de-b34c-8b8b9717e84c", "91382d07-8b89-444c-bbcb-cfe43133af33"
Set-CsTeamsUpdateManagementPolicy -Identity Global -DisabledInProductMessages $DisabledMessages

That should now apply to all tenant users :-)

Thanks to Tony Redmond's Office 365 for IT Pros site for this information: https://office365itpros.com/2024/07/05/in-product-messages/

Microsoft docs for New-TeamsUpdateManagementPolicy: https://learn.microsoft.com/en-gb/powershell/module/teams/new-csteamsupdatemanagementpolicy?view=teams-ps&WT.mc_id=M365-MVP-9501