Microsoft Conferencing Add-In or Microsoft Outlook Schedule a Conference feature fails

Applies to: Microsoft Office Communicator 2007 R2

Symptoms

With the Microsoft Conferencing Add-In for Microsoft Outlook installed the following error will occur when the Conferencing features are chosen from either the Office Communicator 2007 R2 client or the Microsoft Outlook client:

An error occurred while executing this command. If this error persists, please contact your Live Meeting administrator

Using Office Communicator 2007 R2:
  1. Right click on a member of the contact list
  2. Choose Schedule a Meeting from the options menu
  3. When the Meeting invite page opens choose the Communicator Conference Call button from the Conferencing options on the Meeting toolbar
Using the Microsoft Outlook client this issue can occur in the following two scenarios:

Scenario 1
  1. From the Microsoft Conferencing Add-In toolbar
  2. Choose Schedule a Conference Call
Scenario 2
  1. From the Outlook Calendar menu
  2. Choose the Conference call feature from either the New Appointment, New Meeting, or New Items menus on the Conferencing menu

Cause

The signed in user account is configured as a Windows Active Directory Mandatory user account. The %userprofile%\Local Settings\Microsoft\LiveMeeting\LMAddinsLogFile(X).txt file contained the following relevant error information:

17:04:44:512 <RTL> ] [ PID: 3864 TID: 3852 ] Displaying error message "An error occurred while executing this command. If this error persists, please contact your Live Meeting administrator." for HRESULT 0x80090024

0x80090024 = (NTE_TEMPORARY_PROFILE)
 
The error information listed above implies that the conferencing features of Office Communications Server 2007 R2 will not accept requests from a Mandatory User Profile (NTE_TEMPORARY_PROFILE).

This issue occurs when users sign into the Office Communicator client using a Windows Active Directory Domain Services mandatory profile. Mandatory profiles are read-only user profiles. Since changes to the mandatory profile cannot be saved, the design of the RSACryptoServiceProvider functionality does not allow this operation. This causes the creation of the secure keys that are needed for the creation of the focus for the Office Communicator conference to fail.

Resolution

Use a non mandatory user account to use the Microsoft Conferencing Add-In for Microsoft Outlook conferencing features.

More Information

For detailed information on using Mandatory profiles with Windows server and client based computers:

How to customize the default local user profile when you prepare an image of Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2
http://support.microsoft.com/kb/973289

For more detailed information on Crypto API functionality with Mandatory profiles:

RSACryptoServiceProvider fails when used with mandatory profiles
http://blogs.msdn.com/b/alejacma/archive/2007/10/23/rsacryptoserviceprovider-fails-when-used-with-mandatory-profiles.aspx