XFOR: Unable to Access Mailbox After Migration (199309)

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

SYMPTOMS

After you perform a one- or two-step migration of Microsoft Mail or Lotus cc:Mail using the Microsoft Exchange Migration wizard, you cannot access the mailboxes that were migrated from an Outlook or Exchange Client.

When you try to access a mailbox, you receive the following error message:

Unable to display the folder. You do not have Permissions to log on.

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: 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.
To have changes to directory objects picked up immediately by the information store:

Run Registry Editor (Regedt32.exe).
Go to the following key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem
On the Edit menu, click Add Value.
Type Mailbox Cache Age Limit for the Value name.
Select REG_DWORD for the Data type.
Type 1 for the Data of type HEX, and then click OK.
Restart the Information Store service.

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

MORE INFORMATION

For additional information, please see the following article in the Microsoft Knowledge Base:

179065 XADM: Changes to Primary Windows NT Account Do Not Take Effect