If you are migrating from a version earlier than Data Protection for Exchange V6.4, when you configure Data Protection for Exchange to back up databases in an Exchange Server Database Availability Group (DAG) to a common DAG node, all DAG databases are backed up with the new DAG node name, and no longer with the previous Data Protection node name.
After migration, the first backup must be a full backup. To be successful, understand how to manage the backups from previous versions of Data Protection for Exchange.
Do not mix backups that were created with previous versions of Data Protection for Exchange with new backups that are created by using the DAG node. To separate the backups, keep the previous backups under the previous Data Protection node name that is defined in the dsm.opt file in the C:\Program Files\Tivoli\tsm\TDPExchange directory, and use a new DAG node name to store the new backups. If you want to view or restore a backup that is stored under the previous node name, change the Data Protection for Exchange configuration. Over time, when the old backups are no longer useful, you must manually delete them.