A knowledge base article about How to Edit a Composite Group for Official Groups provided by the UC Berkeley IT Service Hub - Knowledge Portal
As official groups change to match current department names and structures, you may need to periodically update your composite groups.
Use the search bar to locate it.
Click the composite group name.
In the upper-right corner, select “More Actions” → “Edit Composite”.
Click Save.
If the composite group is not part of any other groups or is no longer needed, you may decide if it’s still necessary and choose whether to keep it.
For further information on Official Groups, please visit the Official Group Definitions webpage.
For further information on Composite Access Groups, please visit the CalGroups User Guide.