Unable to update a Group Membership

Unable to update a Group Membership

I have been trying to add myself (network administrator) to a group but keep getting the following error:
 
 5 -Access is denied (Terminal Service / Folder Creation)

 

    Reasons:

  1. User does not have rights to create a homefolder.

  2. Users do not have access over terminal services.  
Can you tell me what I may be doing wong?  I have domain admin rights over our AD.
 
Thank you!

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