setting send as permission for a user on a distribution group not taking

I've set "send as" permission for a user to a distribution group, however, after 4 days, outlook is still throwing errors of "You can't send a message on behalf of this user unless you have permission to do so".   I've done the below.  

In ADu&c,  in the security tab of the distribution group, I've added the user and checked the "send as" checkbox.

I am running Exchange 2010 sp1, the distribution group is a universal distribution group.  I've tried this on OWA and I get a red error saying something similar to the NDR I get from outlook.
meredithadamsAsked:
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Adam BrownSr Solutions ArchitectCommented:
Try using the EMS to add the permission with this:

add-adpermission <group name> -user <user to grant permission to> -extendedrights "send as"

If that also doesn't work, check to make sure that the DCs in your environment are replicating properly.
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Zacharia KurianAdministrator- Data Center & NetworkCommented:
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VB ITSSpecialist ConsultantCommented:
Have you tried restarting the Information Store to try and force the change?
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Simon Butler (Sembee)ConsultantCommented:
"Exchange 2010 sp1"

I would start by bringing the server up to date.
Exchange 2010 SP1 hasn't been supported for almost two years.

Simon.
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meredithadamsAuthor Commented:
Hi,  

   I got it resolved.   I read on another post that when you put in the "from" address, the distribution list must be grabbed from the Global Address list.  I didn't because it was hidden so I just typed it in which apparently you can't do.  Anyways, I un hid and tried it again and it worked.  

Thanks for suggestions
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