Microsoft KB Archive/326252

= Exchange 2000 mailbox size limits are not enforced in a reasonable period of time; fix requires Exchange 2000 SP2 =

Article ID: 326252

Article Last Modified on 2/19/2007

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition

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This article was previously published under Q326252



Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



SYMPTOMS
Exchange 2000 mailbox size limits may not be enforced in a reasonable period of time. If users log off and log on, performance does not improve. If you restart the information store, the limits take effect immediately.



RESOLUTION
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 file attributes) 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.

Note Because of file dependencies, this update requires Microsoft Exchange 2000 Server Service Pack 2 (SP2). After you apply this fix, add the Reread Logon Quotas Interval value to the registry.

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To add the Reread Logon Quotas Interval value, follow these steps:  Start Registry Editor (Regedt32.exe). Locate and then click the following key in the registry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem

 On the Edit menu, click Add Value, and then add the following registry value:

Value name: Reread Logon Quotas Interval

Data type: REG_DWORD

Radix: Decimal

Value data: The reread logon quotas interval in seconds. The default value is two hours (7200). The recommended value is 20 minutes (1200).

 Quit Registry Editor.

Because the Reread Logon Quotas Interval value depends on the DSAccess cache and the mailbox information cache, the exact time before the changes take effect also depends on the DSAccess cache refresh time and the mailbox information cache refresh time. The default caching mechanism of DSAccess is 10 minutes. The default caching mechanism for the mailbox information cache is two hours.

You can edit the registry to change the DSAccess cache and the mailbox information cache refresh time to less time. However, this change affects performance because DSAccess performs more Active Directory lookups.

To control the DSAccess cache, change the CacheTTLUser registry value:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeDSAccess\Instance0

Value name: CacheTTLUser

Data type: REG_DWORD

Radix: Decimal

Value data: The cache expiry time for the user data objects in the cache (in seconds). The default value is 5 minutes for the DSAccess cache to be refreshed.

To control rereading the logon quotas in the mailbox information cache, change the Mailbox Cache Age Limit value:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem

Value name: Mailbox Cache Age Limit

Data type: REG_DWORD

Radix: Decimal

Value data: The mailbox information cache age limit in minutes. The default value is two hours.

You must restart the information store after you make any of these registry changes. Also, if you set the time-out values to very low values, you may affect the performance of the server.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information about the version of this fix that requires Exchange 2000 Server Service Pack 3 (SP3), click the following article number to view the article in the Microsoft Knowledge Base:

327378 Exchange 2000 and Exchange 2003 mailbox size limits are not enforced in a reasonable period of time; fix requires Exchange 2000 S327378

Additional query words: MBI flushed XADM

Keywords: kbhotfixserver kbqfe kbbug kbexchange2000presp4fix kbfix kbqfe KB326252

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