On-premises users are unable to see MailTips of Exchange Online users in Outlook 2010

PROBLEM
On-premises users in an Exchange hybrid deployment are unable to see MailTips of Exchange Online users by using Microsoft Outlook 2010. However, they can view the free/busy information of Exchange Online users. 
CAUSE
This problem occurs if the user configured their mailbox to deliver messages directly to a .pst file. MailTips aren't displayed in Outlook 2010 if a .pst file is set as the default delivery location. 
SOLUTION
Configure Outlook 2010 to deliver messages directly to the user's mailbox instead of to a .pst file. 
MORE INFORMATION
For more information, see Introduction to Outlook Data Files (.pst and .ost).

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Article ID: 3194772 - Last Review: 10/13/2016 23:23:00 - Revision: 2.0

Microsoft Outlook 2010, Microsoft Exchange Online

  • o365 KB3194772
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