Error Message
Some channels may have been renamed. See the list below for affected channels. If files are present in the channels, use folder mapping FolderMapping="^TEAM_NAME/Shared Documents/OLD_CHANNEL_NAME->TEAM_NAME/Shared Documents/CHANNEL_NAME" to ensure correct migration. Each affected channel will require its own folder mapping command. Renamed Channels: TeamA/Oldname TeamA/Newname.
Cause
MigrationWiz has detected that Teams Channels on the Source have been renamed. After migration, the channel documents will not be in the expected location.
Resolution
The renamed channels will need individual mapping commands to move channel files into the correct location during the migration process.
The steps for creating the specific folder mapping commands required can be found in the Microsoft Teams Migration FAQ.