Have you ever wondered what the LastPSTSearch registry entry was on a client / Outlook workstation with Enterprise Vault in the environment? Well, for quite some time when I was working with PST migrations I would stumble across issues where test PST files that I had put in place on a client machine weren't being picked up for migration. It seemed sometimes that they were, and sometimes that they weren't.
In the end much of this was down to the LastPSTSearch registry key....
The registry key is related to Client Driven PST Migration, and indicates the date when the last scan for PSTs was performed. If the date is recent, then no new scan will take place. That's why when I was first looking at these sorts of migration issues it would appear to work sometimes, but not others.
The registry key is located here:
HKEY_CURRENT_USER \ Software \ KVS \ Enterprise Vault \ Client
It looks like this:
By default the scanning takes place every 7 days, but that can be changed by altering the policy and synchronising the mailbox settings.