PST marking not working

I'm using E-vault 10.x and have been able to successfully run the PST locator task. In the "Files" node, I see the PSTs but all are marked as "Not Ready" and stay that way until I manually associate them with a mailbox (I have hundreds of PSTs so this won't scale). I have PST marking set to "On" for all of my Exchange desktop policies and the desktop machines all have Outlook and the E-vault add-in in the ribbon. I've opened and closed Outlook a few times but the PSTs aren't getting marked.

Could you please help me figure out why adn get it fixed?

Thanks!