Reinitialize a single Exchange 2010 mailbox?

I'm running PST import tests on a new Exchange 2010 SP1 server. I'm interested in seeing if there's a quick way to restore the account to default and clear its contents. Kind of a reset or reinitialization of a single account.

If by account, you mean specifically the mailbox, I would diable the mailbox (removing it also removes the user account), and just add back a new mailbox (not re-connect). I have done that in the past, and just tested it again.

If I did not understand your question fully, what on the account are you trying to get back to the default?

I found the solution in the Exchange 2010 SP1 documentation and this forum post.

Search-Mailbox -Identity username -DeleteContent works well and deletes the content of the user's mailbox/contacts/etc. It seems to keep folder structure intact, though.

For Exchange 2013, this need to be done first - (add the "Mailbox Import Export" and "Mailbox Search" roles).