Migrate a few PST files and then, when you are familiar with the process, increase the numbers.

Migration is much easier if you have PST files in a few locations, rather than in many. (For this reason, Locate and Migrate copies the PST files to a central location before migrating them).

Sort out the permissions on the PST files before running Policy Manager, otherwise they will fail.

There is a Windows server command-line utility, CACLS, which you can use to grant the Vault Service account Full Control access to the PST files.

When Enterprise Vault archives items, it also converts the contents to HTML and indexes them. There is a default conversion timeout of 30 minutes for this process. Enterprise Vault makes three attempts to convert an item, and so can take up to 90 minutes before failing an item and moving on to the next one.

If there are very large, or very complex, items in a PST file, it can take a long time to migrate them all. If you do not need the content of the items to be indexed, then you can improve performance by lowering the conversion timeout to just a few minutes.

This change to the conversion timeout also affects normal archiving, so remember to return it to the original value when you have migrated the PST files.

You can also improve performance by making Enterprise Vault create text rather than HTML versions of certain document types.