The key construct of an Exchange database file, EDB, is B-trees. Similar to all other B-trees, these structures have hierarchical pages and indexes to allow fast and efficient search. An Exchange Server database show abrupt symptoms, when these indexes get corrupt or are missing. This can occur due to numerous reasons and will make you resort to
EDB Repair steps.
While Exchange database indexes are corrupted or missing, the MS Exchange database troubleshooter tool can encounter several entries with event ID 9519 having error code 0xfffffa84 logging in the application log. Due to this, Exchange Server users might experience problems while accessing or mounting the database.
This problem is observed in MS Exchange Server 2000, 2003 or 2007.
Cause
Error 0xfffffa84 of event ID 9519 is logged, if database index corruption is when you:
1.Run database repair command- eseutil /p...
