Data Management - Ensure External File Sharing in Teams is Enabled For Only Approved Cloud Storage Services

By Ashwin Venugopal -

 














Summary

Collaboration in Microsoft Teams is enabled via file sharing which is conducted within Teams, using SharePoint Online, by default; however, third-party cloud services are also allowed.

Note- Skype for business is deprecated as of July 31, 2021 although these settings may still be valid for a period of time. 

Reason

If only authorized cloud storage providers are accessible from Teams, it will help in dissuading the use of non-approved storage providers. 

What If?

This change's impact highly depends upon current practices in the tenant. If the other storage providers are not used, then, the impact will be minimum, but, if they are being used regularly, then, this will affect their ability to continue to do so.

How to?

To set external file sharing in Teams, use the Microsoft 365 Admin Center:
  1. Under Admin centers pick Teams.
  2. Expand Teams then select Teams settings.
  3. Now, set each cloud storage service under Files to On if it is authorized.

** To verify external file sharing in Teams PowerShell can also be utilized. It should be ensured that Skype for business online, Windows PowerShell module and Microsoft Teams module, both are installed. ** 

       1. Install the PowerShell module for teams. Skype can be downloaded from Microsoft.

 Install-Module MicrosoftTeams
Import-Module SkypeOnlineConnector

       2. Connect to the tenant as a Global Administrator, methods will differ whether 2FA is enabled.
       3. Run the following command to verify which cloud storage providers are enabled for Teams

Get -CsTeamsClientConfiguration | select allow*

       4. Run the following PowerShell command to disable external providers are not authorized. (For                 example disables ShareFile, GoogleDrive, Box, and DropBox)
 
Set-CsTeamsClientConfiguration -AllowGoogleDrive $false -AllowShareFile $false -AllowBox $false -AllowDropBox $false -AllowEgnyte $false

       5. This work may also be verified by running the following PowerShell command again.

Get -CsTeamsClientConfiguration | select allow*

Monitor:

To verify external file sharing in Teams, use the Microsoft 365 Admin Center:
  1. Under Admin centers pick Teams.
  2. Expand Teams then select Teams settings.
  3. Under Files verify that only authorized cloud storage options are set On.

** To verify external file sharing in Teams PowerShell can also be utilized. It should be ensured that Skype for business online, Windows PowerShell module and Microsoft Teams module, both are installed. ** 

       1. Connect to Microsoft Teams using Connect-MicrosoftTeams.
       2. Run the following command to verify which cloud storage providers are enabled for Teams

 Get-CsTeamsClientConfiguration | select allow*

       3. Verify that only allowed authorized providers are set to 'True'.




























































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