MemberlessGroups

Server-Side Components/MemberLessGroups/MemberlessGroups.js

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+var arr=[]; //empty array that can be used later to capture the group names
+var gr = new GlideRecord("sys_user_group"); 
+gr.addActiveQuery();//active query to capture to query through all the active groups
+gr.query();
+while(gr.next()){
+	var br= new GlideRecord("sys_user_grmember"); //querying grmember table to validate group's members
+	br.addQuery("group",gr.sys_id.toString());
+	br.query();
+	if(!br.hasNext()){ // if no member then capture the group name in the array
+		arr.push(gr.name.toString());
+	}
+}
+gs.print(arr.join(",")); //printing the array with all the memberless group names

Server-Side Components/MemberLessGroups/ReadME.md

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+This background script captures all the groups which are active and do not have any members added to the group.
+
+What your script does correctly
+
+Queries all active groups from sys_user_group.
+
+For each group, it checks sys_user_grmember to see if there’s at least one member.
+
+If no member exists (!br.next()), it pushes the group name into arr.
+
+Finally, prints all such group names, comma-separated.
+
+So logically, it works fine and will print all active groups with zero members.