Article ID: 277933 - View products that this article applies to.
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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:
(https://support.microsoft.com/kb/256986/EN-US/ )Description of the Microsoft Windows Registry
On a client computer, when you try to use your mailbox with Outlook 2000, you may receive the following error message:
After you receive the preceding error message, the following event may be logged in the Application Log in Event Viewer on the Small Business Server-based server:
Unable to display this folder, there are no additional Microsoft Exchange client licenses available.
Event ID: 201
Description: No license was available for user domain name\user name using product MSExchangeIS.
This issue can be caused by either of the following situations:
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.
For additional information about Event 201 for Exchange Licensing, click the article number below to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/192712/EN-US/ )SBS Err Msg: Unable to Display This Folder