You don't have sufficient permissions. This operation can only be performed by a manager of the group

When you run the following Powershell command to grant  user sending on behalf of a distribution group:
Set-DistributionGroup "your distribution group" -GrantSendOnBehalfTo Lionel.Messi
You receive the following message
"You don't have sufficient permissions. This operation can only be performed by a manager of the group"

Assuming that you have Exchange 2010 with SP1, you must do the following:
- Install RU3 or later for exchange 2010 (RU5 is out now)
- Execute the following Powershell command:
update-recipient <Group Name>




 

Windows 8 Preview Edition

The new Microsoft Operating System is released in preview edition. Easy to install and with graphical user interface look like MAC OS. :)

The most important feature in this new OS is Hyper V. Unfortunatly, I haven't test it yet because I'm running  Windows 8 under a virtual machine.

For testing purpose, you can follow this link to download Windows 8 Preview Edition :

http://msdn.microsoft.com/en-us/windows/apps/br229516

Have a nice day with Win8 !!!