After adding DL (Distribution List) to the Mail Sync collection and committing changes it fails with Error: Cannot update the agent's database. EMWMigration.log file contains: Error in EMWDBCC::CRecordset::Update: 3315 - Field 'Queue.Name' cannot be a zero-length string. In the agent database, Queue.Name refers to the DN of the queue under any of the collection.
This can be caused by one of the DLs added to the Collection not having the Distinguished Name (DN) AD attribute.
WORKAROUND
1. Removed this DL from the Mail Sync Collection
2. Instead of using the DL, manually add the members of the DL to the collection