1789: Acronis Recovery for Microsoft Exchange Errors Out with "Exchange mailbox role does not exist or is disabled"

Provide the username in the form of DOMAIN\Username; make sure the user is a member of Administrators group, Domain Admins group, Enterprise Admins group; delete the v8.0 subkey from Windows Registry


  1. You run Acronis Recovery for Microsoft Exchange Management Console;
  2. In the main window of the Management Console you Connect to a remote computer;
  3. Once connected, you choose one of the following:
    • Back Up Information Store
    • Back Up Mailboxes
  4. On the Mailbox Selection or Database Selection of the wizard, Acronis Recovery for Microsoft Exchange shows the following error message:


There are several possible causes. Please take a look at the Solution section of the article to troubleshoot the issue.


  1. When connecting to the Agent, please make sure you provide user credentials and domain name of the server to which you are connecting:

  2. Make sure that the user account under which you are connecting is a member of all of the following groups:

    • Administrators group
    • Domain Admins group
    • Domain Users group
    • Enterprise Admins group
    • Exchange Domain Servers
    • Exchange Enterprise Servers
  3. If you are using Microsoft Exchange Server 2007, make sure Microsoft Messaging API and Collaboration Data Objects 1.2.1 are installed;

    (!) Microsoft Messaging API and Collaboration Data Objects 1.2.1 cannot be installed on any other version, except for Microsoft Exchange Server 2007.

  4. The user should have a mailbox on Microsoft Exchange Server. There should be at least one E-mail in the mailbox. The mailbox should not be hidden from the Microsoft Exchange Server address list. You may access that option by right-clicking the mailbox and checking its properties:

  5. If the issue persists on Microsoft Exchange Server 2000 (post-Service Pack 3 rollup) or Microsoft Exchange Server 2003, please do the following on the machine where it is installed:

    • Invoke Windows Registry (Start -> Run -> regedit);
    • Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Exchange\v8.0
    • Export the v8.0 subkey (right-click on the subkey and click Export);
    • Delete the v8.0 subkey (right-click on the subkey and click Delete).

    (!) You can always restore the v8.0 subkey by double-clicking the exported *.reg file.

  6. If the issue is with Windows 2000 Server, do the following:

More information

If the issue still persists, please do the following:

  1. Get the exports of:

    • Local Security Policy -> Local Policies -> Security Options
    • Local Security Policy -> Local Policies -> User Rights Assignment
  2. Contact Acronis Customer Central with reference to this article and the exported files.

See also Connecting to Acronis Recovery for Microsoft Exchange Agent: Known Issues.


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