The System package includes components that cannot be modified. Microsoft Transaction Server uses these components for internal functions. You can view but not set System component properties.
In order for a user to be able to delete and modify packages managed by the MTS Explorer, that user must be mapped to the Administrator role on the System package. If MTS is installed on a server whose role is a primary or backup domain controller, a user must be a domain administrator in order to manage packages in the MTS Explorer.
See Also
Configuring Your MTS Server, Enabling MTS Package Security, Mapping MTS Roles to Users and Groups, Users Folder