Exchange 2013 "You don't have sufficient permissions" when updating distribution groups

When attempting to modify distribution groups within Exchange 2013 you may receive the message "You don't have sufficient permissions. This operation can only be performed by a manager of the group."

If you believe you should have sufficient permissions to make the changes, the following solution should help...

Open up Exchange Powershell on the Exchange server and assign yourself ownership of the group using the following cmdlet: Set-DistributionGroup -ManagedBy "youraccount@yourdomain.com" -BypassSecurityGroupManagerCheck