If you have an upgraded Exchange 2010 environment, you may run across an issue where you get an error that you do not have sufficient permissions to perform an action. I know what you’re thinking… “But I’m logged in as Administrator!” Yes, even as administrator, you don’t have permissions.
This method of getting around this will require you to use the Exchange Powershell Console. Launch the console and you will need to grab the appropriate Exchange Powershell command (Google is your friend on this).
Once you have your command, simply add “-BypassSecurityGroupManagerCheck” to the end of the command and it should run without any errors.
If you need to update your Exchange distribution groups, you can find the command to use on Exchangepro.