Microsoft KB Archive/179065

= Changes to primary Windows NT account on mailbox do not take effect =

Article ID: 179065

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition
 * Microsoft Exchange Server 5.5 Standard Edition
 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange Server 2003 Enterprise Edition

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This article was previously published under Q179065





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
If the primary Windows NT account for a mailbox is changed, the new primary Windows NT account does not have immediate access to the mailbox and the previous primary Windows NT account still maintains access for some period of time.

This problem may also occur after a move mailbox operation.



CAUSE
The information store caches information contained in the directory store and, by default, it re-reads it every 120 minutes. Therefore, any change to a directory object (for example, a primary Windows NT account change) is not reflected in the information store for two hours.



WORKAROUND
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 have changes to directory objects picked up immediately by the information store, follow these steps:  Run Registry Editor (Regedt32.exe). Locate the following key:

 On the Edit menu, click Add Value. Enter Mailbox Cache Age Limit for the Value name. Type REG_DWORD for the Data type.</li> Type 1 for the Data of type DECIMAL, and then click OK.

NOTE: This registry entry is not a switch, it is a setting. If it is set to 1 the server rereads the cache every minute; if it is set to 2 the server rereads the cache every 2 minutes, and so forth.</li> Stop the information store service.</li> Restart the information store service.</li></ol>

The information store now updates its mailbox cache frequently by rereading the directory every minute.

<div class="status_section">

STATUS
In Microsoft Exchange Server 4.0 and 5.0, the information store rereads the directory every time there is a change to a directory object. This process was not optimized and did not offer the best performance. To optimize performance, Exchange Server 5.5 caches the directory information and rereads the directory every two hours by default.

Additional query words: resources ntaccount permissions changes delay latency latent

Keywords: kbbug kbpending KB179065

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