Adprep detected that the logon user is not a member of the following groups: Enterprise Admins Group and Schema Admins Group. ...

Adprep detected that the logon user is not a member of the following groups: Enterprise Admins Group and Schema Admins Group. [Status/Consequence] Adprep has stopped without making changes. [User Action]  Verify the current logged on user is a member of Enterprise Admins group, Schema Admins group and %1\Domain Admins group.