you can rebuild it manually:
Rebuild the Indexes:
1. Stop all Enterprise Vault services except Admin, Directory, Indexing, & Storage.
2. Once all MSMQ queues are finished processing, then stop the remaining services.
If they do not empty, you can purge using the steps in the "More Information" section below.
3. Browse to your Indexes.
4. Find the Index -You can look on the Advanced tab of the Properties of the archive
Example: 13B59F5821C8C764F9834C867530951111110000kvsvault.
5. Rename the index to xxx13B59F5821C8C764F9834C867530951111110000kvsvault (just add 3"x"s to the beginning).
6. Launch SQL, go to the Vault Store database EVVaultStore, and open the ArchivePoint table.
7. Look for ArchivePointId of 13B59F5821C8C764F9834C867530951111110000kvsvault and change the ReplayState to "1".
8. If the Replay state is already set to "1", then set it to "0" and purge the "vault storage replay" queue
(If you need procedures for purging the queue, refer to steps in "More Information")
9. After the queue has been purged, then reset the replay state to "1"
10. Restart all of your services, the Index will rebuild itself.
This will take some time.
11. You will see messages in the App log such as "Processing Transaction ###### of ######",
this way you can monitor the index rebuild process.
12. The time it takes for the rebuild process to finish depends on the size of the index, so it may last several hours.
MORE INFORMATION How to purge MSMQ Queues:
1. From the desktop of the message Queuing server, right click the "My Computer" icon and select "Manage"
2. Expand the following: Services and Applications>Message Queuing>Private Queues>Enterprise Vault Storage Replay
3. Right click on "Queue Messages" and select All Tasks>Purge