How can I delegate control to say my help desk to only be able to manage mailbox quotas? Just quotas; nothing else? Is there an easy way to accomplish this?

What is the version of exchange you are talking about ?? If i understand well in Exchnage 2007 you can not assign only this specific permission, Yes this is more easy in Exchange 2010 RBAC model. Some more information are below :: Configuring Permissions in Exchange Server 2007:: http://www.microsoft.com/downloads/details.aspx?FamilyID=8F74D1F7-3B50-42BA-8431-33DAA72A8A25&displaylang=en&displaylang=en http://msexchangeteam.com/archive/2006/11/03/430350.aspx Understanding Role Based Access Control in nExchnage 2010 :: http://technet.microsoft.com/en-us/library/dd298183.aspxAnil

I'm using Exchange 2007.