The group_id can be a group name (cn) or a regid.
A set of members can be specified with a comma-separated list.
Specifying no members will delete all members. See Groups WebService Delete Members
GWS tries to guess the type of identifier you enter. You may express the type specifically using a type preface.
For example, u:spud_123 is a UW NetID, wheres g:spud_123 is a group id.
Group not found