When the Backup Exec is upgraded to Backup Exec 2012 with synthetic backup policy and an incremental backup and the synthetic backup are executed after the upgrade, the synthesized full backup sets miss some data. This issue reproduces only with remote server synthetic backups.
A hotfix is now available for this issue in the current version(s) of the product(s) mentioned in this article. Refer to the Hotfix link under Related Articles at the end of this article to obtain the hotfix needed to resolve the issue.
Backup Exec 2012 Rev 1798 Hotfix 213186 (TECH213186)
NOTE: After apply the hotfix the Backup Exec Remote agent must be updated on remote server where the Synthetic Backups are being performed.
New FULL Baseline Synthetic Backups must be performed.