Article ID: 842019 - View products that this article applies to.
Important This article contains information about how to modify the registry. Make sure that you 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:
(http://support.microsoft.com/kb/256986/ )Description of the Microsoft Windows registry
When you try to retrieve the client permissions of a public folder by using Exchange System Manager in Microsoft Exchange Server 2003, you may receive the following error message:
The information store could not be opened. The logon to the Microsoft Exchange server computer failed.
ID no: 80040111-0286-00000000
ID no: C1050000
Exchange System Manager
This problem may occur if the user account that you are using Exchange System Manager under belongs to many groups.
Service pack informationTo resolve this problem, obtain the latest service pack for Exchange Server 2003 . For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/836993/ )How to obtain the latest service packs for Exchange Server 2003
Other resolution methodsThis problem involves a buffering problem with the Wininet component in Microsoft Internet Explorer. To resolve this problem, use one of the following methods:
How to set the MaxTokenSize registry valueThis resolution provides a registry value that you can use to increase the size of the Kerberos version 5 protocol token. For example, if you increase the token size to 64 kilobytes (KB), a user can belong to more than 1600 groups. Because of the associated security identifier (SID) information, this number may vary.
To set this registry value, follow these steps:
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 the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To work around this problem, reduce the number of groups that your user account belongs to.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Exchange Server 2003 Service Pack 1.
For more information about Kerberos token size configuration and support in Windows 2000, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/263693/ )Group Policy may not be applied to users belonging to many groups