And the tip of the day!
How to restore deleted items from users deletions-folder before it get’s Purged.
First see what format are you using for date:
Get-Date
And then use this one-liner (Finnish format for date included :)) for search and dump the items to a restore mailbox:
Search-Mailbox -identity sourcemailboxname -SearchQuery {Received:1. kesäkuuta 2015..23. kesäkuuta 2015}
-SearchDumpsterOnly -TargetMailbox targetmailboxname -TargetFolder recoverDumpster
Easy as that.