Hello Everyone, In my Exchange Server 2007, I've just created a security enabled distribution group with me and some members, I also have checked (put tick box) in the "Send As" attributes from ADUC console. But how come I always get NDR "You are not allowed to send this message because you are trying to send on behalf of another sender without permission to do so. Please verify that you are sending on behalf of the correct sender, or ask your system administrator to help you get the required permission." ? I wonder what should I do in order to resolve this issue ?/* Server Support Specialist */

How long have you waited?Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hi Albert, Are you the only one in the group facing this problem? Thank you, msdn =) 99.9% of my questions have been answered :D

no all of us affected. I've waited over the weekend already./* Server Support Specialist */

What did you insert in the "From" field on outlook client before sending an email?Thank you, msdn =) 99.9% of my questions have been answered :D

That's long enough!Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Sadly the problem still exist even though I have already grant myself explicitly using: Add-AdPermission "Group Name" -User "MyUserName" -AccessRights ExtendedRight -ExtendedRights "Send As" User : DOMAIN\MyUserName Identity : DOMAIN.com/Users/Group Name Deny : False AccessRights : {GenericAll} ExtendedRights : IsInherited : False Properties : ChildObjectTypes : InheritedObjectType : InheritanceType : None User : DOMAIN\MyUserName Identity : DOMAIN.com/Users/Group Name Deny : False AccessRights : {ExtendedRight} ExtendedRights : {Send-As} IsInherited : False Properties : ChildObjectTypes : InheritedObjectType : InheritanceType : All /* Server Support Specialist */

OK, I've issued this command below: Add-ADPermission "My Group" -User "MyUserName" -AccessRights ExtendedRight -ExtendedRights "Send As" Get-ADPermission "My Group" -User "MyUserName" | fl and then deleting the autocomplete from my outlook, it works for now. /* Server Support Specialist */

Thanks for sharing. EvanPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.