Subsequent COM Calls in a Win32 Process May Not Work After Call to Methods in Microsoft.DiskQuota Object (297835)

SYMPTOMS

In a Win32 process, calls to COM servers (both in-process and out-of-process) stop working after earlier calls to methods in the Microsoft.DiskQuota COM object. When this occurs, no consistent error HRESULT value is returned.

CAUSE

This problem can occur when the Microsoft.DiskQuota COM calls the CoFreeUnusedLibraries API when it is released by a client process. A call to this API results in all COM libraries being unloaded from a process. These libraries are in use (or required) by the process to do its work, and because of this, COM calls in the process do not work. Only the client process should call this API when it interprets that the COM libraries are no longer needed.

RESOLUTION

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:

301378 XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack

The English version of this fix should have the following file attributes or later:

   Date        Time      Version        Size     File name
   ----------------------------------------------------------
   5/4/2001    04:09p   5.0.2195.3575   92,944   Dskquota.dll

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 3.

MORE INFORMATION

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:

265173 The Datacenter Program and Windows 2000 Datacenter Server Product

For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:

296861 Use QChain.exe to Install Multiple Hotfixes with One Reboot

For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes