IMPORTANT: This article contains information about modifying the registry.
Before you modify the registry, make sure to back it up and make sure that you
understand how to restore the registry if a problem occurs. For information
about how to back up, restore, and edit the registry, click the following
article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
RESOLUTION
Exchange 2000
To resolve this problem, obtain the Microsoft Exchange 2000
Server Post-Service Pack 3 MDB patch.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
329882
Exchange 2000 Server
Post-Service Pack 3 MDB fixes available
After you apply this fix, add the
Reread Logon Quotas Interval value to the registry.
Exchange 2003
To resolve this problem, add the
Reread Logon Quotas Interval registry value.
Adding the Reread Logon Quotas Interval registry value
WARNING: If you use Registry Editor incorrectly, you may cause serious
problems that may require you to reinstall your operating system. Microsoft
cannot guarantee that you can solve problems that result from using Registry
Editor incorrectly. Use Registry Editor at your own
risk.
Follow these steps to add the
Reread Logon Quotas Interval value.
.
- 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 5 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. If the value does not exist, create the following entry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeDSAccess\Instance0
Note Create the Instance0 subkey if the subkey does not already exist. To do this, on the Edit menu in Registry Editor, point to New, and then click Key. Type Instance0 and then press ENTER.
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. If the value does not exist, create the following entry:
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.