Teams channel files are missing due to previous channel rename on source prior to June 2022 (4369572)

Teams channel files are missing due to previous channel rename on source prior to June 2022

If a Microsoft Teams channel was renamed before June 2022 and later migrated using On Demand Migration (ODM), the files for that channel may not appear under the renamed channel in the target tenant.

Behavior

• The channel rename is reflected in Teams.

• However, the underlying SharePoint folder on the source tenant was not renamed (this was expected behavior prior to June 2022).

• During migration, ODM migrates files based on the original SharePoint folder name.

As a result, in the target tenant:

• The renamed channel exists but contains no files.

• The files are migrated to the original channel name, which is also created as a channel in the target team.

Example

Source Tenant

• Team Name: Support

• Original Channel Name: Test

• SharePoint Folder: Test

• Channel Renamed To: Test1

• SharePoint Folder After Rename: Test (unchanged)

Target Tenant After ODM Migration

• Team Name: Support

• Channel: Test

  • SharePoint Folder: Test

  • Content: Migrated files

• Channel: Test1

  • SharePoint Folder: Test1

  • Content: Empty

Root Cause

Before June 2022, renaming a Teams channel did not rename the associated SharePoint folder. ODM migrates content based on the SharePoint folder name, which causes files to be placed under the original channel name in the target tenant.

Outcome

The migrated content for the renamed source channel will be located under the original channel name in the target tenant.

 

The customer's Team channel was renamed at some point prior to the Microsoft June 2022 update that keeps channel renames and SharePoint folder aligned.

There is no method within ODM to map a folder within the SharePoint document library to another location such as a new channel name folder. 

OPTIONS:

 

1. The files can be accessed from the original channel name Files tab, which was migrated to the target and has the files associated.  
2. Access the SharePoint document library for the Team and open the folder for the original channel name, select all files and then use the Move option and choose the new channel name folder.

Note: Possible workaround to change the source channel name and change it back prior to migrating. For example changing "Support Meeting" to "Support Meeting1" and then confirm the SharePoint folder updated. Once confirmed change back to the desired name and provision and migrate the team. This is not tested in our support environment as we cannot reproduce due to the below fix being in place by Microsoft that now keeps the channel rename and folder name in alignment. https://www.microsoft.com/en-us/microsoft-365/roadmap?filters=&searchterms=72211