Article ID: 319175 - View products that this article applies to.
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After you install Exchange 2000 Service Pack 2 (SP2) or later, new Messaging Application Programming Interface (MAPI) profiles may not be able to point to a front-end Exchange computer and perform a check names query.
You may receive a Microsoft Outlook error message that is similar to:
You may also find that restarting the Exchange System Attendant Service does not report the following event ID message in the Application event log when the service restarts:
Outlook could not log on. Check to make sure you are connected to the network and are using the proper server mailbox name. Network problems are preventing connection to the Microsoft Exchange Server computer. Contact your system administrator if this condition persists. You can choose File->Work Offline to work locally until the server becomes available.
Event Type: Information
In Exchange 2000 Service Pack 2 and later, the following services do not run on front-end servers:
Although Microsoft does not recommend that you use mailboxes on a front-end Exchange 2000 computer, Exchange 2000 SP3 has added functionality to permit this to work correctly. To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
301378The English version of this fix should have the following file attributes or later:
(https://support.microsoft.com/kb/301378/EN-US/ )XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack
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Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server. This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 3.
After you apply this fix, an administrator can use a registry value to turn on DSProxy services (RFR service and NSPI Proxy) on a front-end server: