Only internal emails arrive at his inbox, they stay in for 10seconds to 2min and then get moved to Deleted Items sub folder Junk. External emails stay in inbox no issue there.
The user has no rules in mailbox. I have checked it on outlook as well as webmail. I have used MFCMapi app to inspect user mailbox and I could not see any user rules or damaged rules in there.
Even if you move any emails from DELETED\JUNK to any other folder it jumps back to DELETED\JUNK folder.
I called Microsoft and they did some back end stuff and emails stopped moving to JUNK for few hours but its started again.
I like to know if others are having this issue or anything.