Migrated email missing the left angle bracket, "<", in the From field. When replying to an email with this issue, the reply address is invalid due to the missing "<" symbol. This issue does not affect all messages, but seems to only affect messages generated by scripts.
Issue fixed in version 22.214.171.124.
To fix messages that were not migrated correctly, re-run the migration on the affected mailbox with the following switches in gwmigapp.ini or/and gwdtapp.ini
This issue can be verified by running a migration with logging set to verbose. The from field in the verbose log will not display the "<" symbol.
For additional status updates or information on this please contact your account manager and reference the Change Request # TFS 235444.