Five Administrator Roles

- Full administrator - complete authority over the entirety of XenDesktop site

- Read-only Administrator - can view but not change settings

- Machine Administrator - responsible for Catalogs and task with building virtual desktops

- Assignment Administrator - consuming desktops in a Catalog, packing them into Groups and assigning to users

- Help desk Administrator - day-to-day activities including user assistance and individual VM problem resolution

 

How to Create a VMWare User Account with Minimum Permission to Manage Machine Creation Services on XenDesktop 5.0

http://support.citrix.com/article/CTX127546