Private Teams channel unarchive error

Hi Maksym,

Thank you for posting your question on the Microsoft Q&A forum.

In this situation, when you are unable to archive a private channel in Microsoft Teams, especially when the option “Make the SharePoint folder read-only for team members” is selected, you may want to check the following points:

1/ Check the private channel SharePoint site

Each private channel has its own site in Microsoft SharePoint, and Teams needs to modify permissions there when the read-only option is enabled.

• Go to Microsoft Teams > the Private Channel > Files tab.
• Click Open in SharePoint.
• Verify that:
  • The site loads normally.
  • You have Owner permissions.
  • The Members group exists and has access.
• If permissions appear to be incorrect, you may ask a SharePoint admin to:
  • Open the SharePoint Admin Center.
  • Go to Active sites.
  • Locate the private channel site
  • Check Permissions and ensure:
    • Channel Owners:  Owners group
    • Channel Members: Members group
• After confirming this, try archiving the channel again.

2/ Verify site permission groups

• In SharePoint, click Settings.
• Select Site permissions.
• Choose Advanced permission settings.
• Check that the following groups are present with the expected role - Private Channel Owners: Full Control - Private Channel Members: Edit

3/ Confirm the SharePoint Site is fully initialized

Sometimes the SharePoint site for a private channel is not fully initialized, especially if the Files tab has never been opened.

You can try the following:

• Open the private channel in Teams.
• Select the Files tab.
• Wait for the SharePoint library to load.
• Upload a small test file.
• Try archiving the channel again.

This process helps ensure the SharePoint document library is properly provisioned.

4/ Try archiving from the Teams browser

You can try performing the archive operation using the Teams web version to check if it works or not

5/ Archiving without the Read-Only option.

• Start the archive process again.
• Uncheck the option: “Make the SharePoint folder read-only for team members.”
• If the archive succeeds without this option, you can later set the folder to Read-only manually in the SharePoint permissions.
  • 

If the issue persists, it is possible that the private channel SharePoint site is corrupted. You may consider:

• Exporting or downloading the files from the channel.
• Creating a new private channel.
• Uploading or moving the files to the new channel.

I hope the information above is helpful. If you have any further questions, please feel free to reach out.

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