Here’s a very basic example of a script to review group membership on Jira Server/DC

By first fetching the groups, and then the users in each group, we take the most efficient path toward only fetching the users who are in a group.

On the other hand, we could also tweak this script to show us users who are NOT in a group, or who are in  X or fewer groups.   That might be interesting, too.

import com.atlassian.jira.component.ComponentAccessor

def groupManager = ComponentAccessor.getGroupManager()
def groups = groupManager.getAllGroups()
def sb = []
//Define a string buffer to hold the results

sb.add("<br>Group Name, Active User Count, Inactive User Count, Total User Count")
//Add a header to the buffer
groups.each{ group ->

 def activeUsers = 0
 def inactiveUsers = 0
 Each time we iterate over a new group, the count of active/inactive users gets set back to zero
 def groupMembers = groupManager.getUsersInGroup(group)
 //For each group, fetch the members of the group
    
    groupMembers.each{ member ->
    //Process each member of each group
        
    def memberDetails = ComponentAccessor.getUserManager().getUserByName(member.name)
    //We have to fetch the full user object, using the *name* attribute of the group member
        
        if(memberDetails.isActive()){
            activeUsers += 1 
        }else{
            inactiveUsers += 1
        }
    }//Increment the count of inactive or active users, depending on the current user's status
    
sb.add("<br>"+group.name + ", " + activeUsers + ", " + inactiveUsers+ ", " + (activeUsers + inactiveUsers))
//Add the results to the buffer
}
return sb
//Return the results