A user has 3 inboxes with 1 .pst file and 2 .ost files.  How do we combine into the 1 .pst file so as to have only 1 inbox?  The problem may be that the .pst file is associated with a POP account and the each of the .ost files are associated with IMAP

Hello John,

The forum is for developers. I'd suggest asking non-programming questions on the Microsoft Community or Outlook IT Pro Discussions forum instead.

You may find the following links helpful:

Deliver all POP3 Accounts to one Outlook Inbox

How to Combine Two Mailboxes in Outlook

Hi,

As you are using .ost files for IMAP Accounts, I think you are using Outlook 2013.

Please note that the delivery folders for IMAP accounts cant be changed. A workaround is to setup a rule for each IMAP account to forward the email to the POP3 account, which has been mentioned in the link provided by Eugene Astafiev.

Regards,

Melon Chen
TechNet Community Su

Hi,

Just checking in to see if the information was helpful. Please let us know if you would like further assistance.

Regards,

Melon Chen
TechNet Community Su

Hi,

I'm marking the reply as answer as there has been no update for a couple of days.

If you come back to find it doesn't work for you, please reply to us and unmark the answer.

Regards,

Melon Chen
TechNet Community Su