Symptoms
When you use Microsoft Live MeetingIntranet Portal, you may receive the following error messages:

Exception_1013: The Directory Service returned an exception

Inner Exception(1): Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: indexThe call stack trace that is generated when this issue occurs may resemble the following call stack trace:

at System.Collections.ArrayList.get_Item(Int32 index)at System.DirectoryServices.ResultPropertyValueCollection.get_Item(Int32 index)at Microsoft. LiveMeeting.DirectoryService.GetDirectoryUser(AuthenticatedUser authUser)at Microsoft.LiveMeeting.Services.GetDirUser(AuthenticatedUser authUser)
Resolution
This issue occurs if you do not use Microsoft ASP.NET version 1.1.4322.
Additionally, this issue may occur if the Live Meeting Intranet Portal virtual directory is not set to use ASP.NET version 1.x.