Enabling IMAP and POP3 for Microsoft Exchange 2013
Log in to the Microsoft Exchange 2013 Administration Tool using the email address and password associated with your Microsoft Exchange 2013 account.
Click on Connectivity Settings.
Place a check mark next to IMAP or POP. If you want to use both technologies in different email programs, simply check both boxes.
Then click Apply.
Please wait about 60 minutes until the changes have been applied to our servers.