Microsoft KB Archive/816507

= XADM: OWA Clients Experience Prolonged Time to Log On or the Logon Process Stops Responding =

Article ID: 816507

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition

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SYMPTOMS
Exchange 2000 Outlook Web Access (OWA) clients may take a long time to log on to OWA, or the logon process may stop responding (hang) indefinitely.



CAUSE
This issue may occur when queries that retrieve maximum password age stop responding because of network connectivity issues such as issues that are caused by incorrect network configuration or by Windows Internet Naming Service (WINS) resolution problems.



Cumulative Rollup Information
To resolve this problem, obtain the September 2003 Exchange 2000 Server Post-Service Pack 3 (SP3) Rollup. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

824282 September 2003 Exchange 2000 Server Post-Service Pack 3 Rollup

Hotfix Information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange 2000 Server Service Pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

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 usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Component: Information Store

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date                   Time   Version             Size            File name --  10-Mar-2003  22:26  6.0.6434.0      3,915,776    Cdoex.dll 10-Mar-2003 22:14  6.0.6434.0        827,392    Davex.dll 10-Mar-2003 22:06  6.0.6434.0        577,536    Dsaccess.dll 10-Mar-2003 21:06  6.0.6434.0        184,320    Dscmsg.dll 10-Mar-2003 22:26  6.0.6434.0      3,571,712    Excdo.dll 10-Mar-2003 22:07  6.0.6434.0        258,048    Exmime.dll 10-Mar-2003 22:14  6.0.6434.0      2,138,112    Exoledb.dll 10-Mar-2003 22:03  6.0.6434.0         81,920    Exosal.dll 10-Mar-2003 22:14  6.0.6434.0        307,200    Exprox.dll 10-Mar-2003 21:01  6.0.6434.0      2,285,568    Mdbmsg.dll 10-Mar-2003 20:44  6.0.6434.0         32,768    Mdbrole.dll 10-Mar-2003 22:05  6.0.6434.0      4,644,864    Store.exe Note Because of file dependencies, this hotfix requires Exchange 2000 Server Service Pack 3 (SP3). For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

301378 How to Obtain the Latest Exchange 2000 Server Service Pack



WORKAROUND
To work around this issue, restart the OWA server.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
Exchange 2000 Server Service Pack 1, Exchange 2000 Server Service Pack 2, and Exchange 2000 Server Service Pack 3 all use Davex.dll to retrieve maximum password age. Davex.dll is designed to handle 10 simultaneous queries; then other queries must wait for the first 10 to complete. If a network configuration problem (such as a WINS configuration issue) keeps the Davex.dll calls from being able to communicate by using the NetBIOS names on the domain controller, the queries stop responding indefinitely. This behavior causes subsequent queries to wait also.

The Exchange 2000 post-SP3 hotfix that is presented in this article minimizes the affect of this logon problem by using DSAccess. DSAccess caches more local information and therefore reduces some of the network traffic.

To confirm whether the problems that you experience are related to network configuration issues, run Dcdiag.exe from the OWA server against the domain controllers that service the Netlogon request for the OWA server.

Note The Dcdiag.exe tool is included with Windows Support Tools. To install Windows Support Tools, run Support\Tools\ Setup.exe on your Windows CD.

Additional query words: kbExchange2000preSP4septbarFix

Keywords: kbqfe kbhotfixserver kbfix kbexchange2000presp4fix kbbug KB816507

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