This article was previously published under Q296151
After you install Microsoft Exchange Server 2003 or Microsoft Exchange 2000 Server, the following event may appear in the Application log:
Event Type: Error Event Source: MSExchangeFBPublish Event Category: General Event ID: 8213 Description: System Attendant Service failed to create session for virtual machine computername. The error number is 0x80044501.
To resolve the issue that the "Symptoms" section describes, edit the registry, and then set the permissions in Exchange 2003 or in Exchange 2000. To do this, follow these steps.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
Warning If you have any programs that use the IAddressee::GetFreeBusy function from Collaboration Data Objects for Exchange 2000 on the affected server, the IAddressee::GetFreeBusy function stops working if you add the following registry key. In most scenarios in which this registry key is added, the function returns an error code of 0x8000FFFF.
Start Registry Editor.
Locate the Server value under the following key in the registry:
In the Value Name field, type FreeBusyQuerySessions, set the Data Type to REG_DWORD, and then click OK.
In the Data field, type 00000000, and then click OK.
Quit Registry Editor.
Restart the Microsoft Exchange System Attendant.
Start Exchange System Manager, and then locate the storage group.
Click the private store, and then right-click Properties.
Click the Security tab, and then click the Exchange service account.
Click View information store, click Administer information store, and then set the permissions.
Reset the Administrative Group's service account.
To reset the Administrative Group's service account, follow these steps:
Back up the Exchange Server 2003 or Exchange 2000 Server information store and the Windows system state data of a domain controller.
Start the ADSI Edit tool.
Expand Configuration Container [domain name], expand CN=Configuration,DC=Domain_name, expand CN=Services, expand CN=MicrosoftExchange, expand CN=Organization_Name, and then expand CN=Administrative Groups
Right-click CN=Your Admin Group Name, and then click Properties.
Click the Attribute Editor tab.
Double-click the following properties, note the value if there is a value in the property, and then click the CLEAR button:
Type 2 for the value.
Note Before you change the value to 2, note the original value.
Click OK, click Apply, and then click OK.
Quit the ADSI Edit tool.
Restart the Microsoft Exchange System Attendant service and all dependent services.
ADSI Edit is included with the Windows Support Tools. You can install the Windows Support Tools from the Support\Tools folder of the Windows 2000 Server CD-ROM or the Windows Server 2003 CD-ROM. For more information about how to install the Windows Support Tools for Windows 2000, click the following article number to view the article in the Microsoft Knowledge Base:
301423 How to install the Windows 2000 Support Tools to a Windows 2000 Server-based computer
For more information about Exchange Server 2003 tools and updates, visit the following Microsoft Web site: