What should be done if Exchange information store goes to crashed state?
There are two ways for restoring a crashed Exchange information store:
Method 1: Removal of all affected database files and mount affected store: This method is very fast for restoring services for the user and makes the previous data available easily. However, there is a chance of data loss.
Method 2: Restore fully from backup: This methods performs a full restore of data with the help of backup data. During the restore process, user will not be able to access their mailboxes as the store will not be mounted till it the restore process gets completed.