Outlook - Exchange connection issues when MAPI is disabled for a user

Symptoms
Consider the following Scenario:

  • You try to create a new Outlook profile and you receive the following error message:

    The action cannot be completed. The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action.

  • You are unable to connect to your Exchange mailbox with an existing Outlook profile and Disconnected displays in the Outlook Status Bar:

    Outlook 2010 Disconnect

    Outlook 2013 Disconnect

  • You are unable to open Public Folders or an Online Archive and you receive the following error message:

    Cannot expand the folder. Microsoft Exchange is not available. Either there are network problems or the Exchange server is down for maintenance. 
Cause
You do not have MAPI enabled in your protocol settings.
Resolution
To resolve this issue run the following from the Windows PowerShell cmdlet from Exchange Management Console
Set-CasMailbox User1@contoso.com -MapiEnabled $True
More information
 You can verify MAPI is enabled by checking the protocol settings for the user:




For more information about protocol settings and Adsiedit see the following TechNet article:

ADSI Edit (adsiedit.msc)

Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.
Properties

Article ID: 2996728 - Last Review: 01/13/2016 08:46:00 - Revision: 5.0

Outlook 2016, Microsoft Outlook 2013, Microsoft Outlook 2010

  • KB2996728
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