Example :
Meeting link migration shows 100% completed on task, but still this error is being flagged on the AD attribute called "logger" :
Failed to migrate meeting links. Value cannot be null. (Parameter 'logger').
This error might be caused by ODM trying to insert or update a field that requires a valid value.
Hence there might be missing, outdated or NULL values in some AD attributes which ODM needs to use for migrating meeting links.
Please go to ODM Accounts Module, select your affected accounts, then run "Discovery > Refresh Selected Account".
This should trigger a re-read from both source and target to update on M365 properties for those selected accounts in ODM, so that you should not see such error again when retrying on Meeting Links Migration.