XADM: Store Handle Leak When Receiving Invalid POP3 NTLM Authentication (214573)
The information in this article applies to:
- Microsoft Exchange Server 5.0
This article was previously published under Q214573 SYMPTOMS
The Microsoft Exchange Information Store service may leak handles when POP3 users attempt to use NTLM authentication with credentials that fail to be authenticated. To observe if this happening, start Performance Monitor and add the Handle Count counter for the Services.exe instance under the PROCESS object. This counter will increase as failed logins increase.
CAUSE
The Exchange Information Store service creates a credential handle (in Services.exe) when a user attempts to log on. If the credentials that are passed in fail authentication, the Information Store service does not free the handle. Instead, it creates a new handle on the next attempt. These handles are not freed up until the Exchange Information Store service is stopped.
NOTE: This behavior is corrected in Version 5.5 of the product.
RESOLUTIONA supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft Exchange Server version 5.0 service pack that contains this hotfix. To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site: NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this fix should have the following file attributes or later:
Component: Information Store
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| Mdbmsg.dll | 5.0.1461.83 | | Store.exe | 5.0.1461.83 |
STATUSMicrosoft has confirmed that this is a problem in Microsoft Exchange Server version 5.0.
| Modification Type: | Minor | Last Reviewed: | 10/7/2005 |
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| Keywords: | kbHotfixServer kbQFE kbbug kbExchange500preSP3fix kbfix kbQFE KB214573 |
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