SMTP Configuration - Unspecified Error

UPDATED: The public hotfix is now available for this. 

 

We are seeing a new issue where you are unable to configure the Access Tab of the SMTP Virtual Server. This happens on a server running SMTP and MOSS. Users are seeing this issue after applying Hotfix 946517.

 

SMTP still functions fine, the only issue is with making changes to the Access Tab of the SMTP virtual server.

 

The public hotfix is now available. See this article:

950426 You cannot apply the changes that you make on the Access tab of the properties page for an SMTP virtual server on a Windows Server 2003-based computer after you apply hotfix 946517

https://support.microsoft.com/default.aspx?scid=kb;EN-US;950426