You're absolutely right Terry. Many of the reports do use a user with sysadmin rights for exactly that reason (not just diskspace but others such as the Stopped Agent report that uses xp_servicecontrol to interrogate the status of the SQL Server Agent on each server), but I have the flexibility to do that where I work because of the environment particular to our organisation and the context within which these servers exist. I have just tried other methods such as using the EXECUTE AS clause to grant a user with lesser rights "EXECUTE" to the extended proc. But none work. I'll certainly have a think about it, particularly as I may be moving to a less secure environment with another company. Sorry I couldn't help.