If you want to rebuild you do not have to do any of that. What you would do is change the indexing level on the property page of the archive. Be aware, if you lower it from Full you will not be able to phrase search. If you click help on that property screen it should bring up the dialouge that explains the different settings.
Then, either using the indexreplay.htm or manually rebuild process let the archive rebuild. It can take awhile and while the index is rebuilding you will not get good search results, but archived items should still be able to be viewed ok.
The IndexReplay.htm will be on the root of the Enterprise Vault install directory.
I put this in a previous post, but here are the manual steps to rebuild:
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