When using Autodiscover Outlook fails to connect to an Exchange 2010 SP1 mailbox with "Unable to open your default e-mail folders" if the user was moved cross forest

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When using autodiscover to connect to an Exchange 2010 SP1 mailbox, an Outlook client may present one or both of the following error messages repeatedly:

Unable to open your default e-mail folders. The Microsoft Exchange Server computer is not available.
Microsoft Exchange administrator has made a change that requires you quit and restart Outlook.

The following should also be true:
  • The mailbox in question was moved across Active Directory forests in the past (a move from one Exchange organization to the other).
  • The mailbox was, or still is enabled for personal Archive.
  • If you run the Test e-mail Auto Configuration test for the Outlook client, you might see the discrepancy in the following two lines of test results (on the XML tab):


Note: The domains do not match.


When a mailbox is being moved across different Exchange forests, the mailbox enabled user in the original forest is converted to a mail enabled user. If that mailbox is also enabled for personal Archive, one of attributes that the original forest object (a mail enabled user) can have is called msExchArchiveDatabaseLink. If present on the mail enabled user, the attribute will likely point to a database in the "wrong" forest - as the user's mailbox is now in the forest where it was newly moved.

The conflicting information will then confuse an Outlook client during the Autodiscover process, causing it to report errors as mentioned above.

Microsoft Exchange 2010 SP1 cross forest move will not create this problem, as the attribute will be cleared properly during the mailbox move.


If you have moved archive-enabled mailboxes cross forest prior to installing Microsoft Exchange 2010 SP1, we recommend that you clear the value of the msExchArchiveDatabaseLink attribute on any mail enabled users that might have them populated. You can use a tool such as ADSIEdit to remove the value of this attribute.


To Run the Test e-mail Auto Configuration test:
  1. Press and hold the CTRL key and then right-click the Outlook icon in the system tray.
  2. Click Test e-mail Auto Configuration.
  3. In the E-mail Address box, type the alias of the affected user.
  4. In the Password box, type the user’s password.
  5. Click to select the Use Autodiscover check box, and then click Test.
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.


Article ID: 2387770 - Last Review: August 24, 2010 - Revision: 1.0
  • Microsoft Exchange Server 2010 Enterprise
kbsurveynew KB2387770

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