This PowerShell script has two use cases combined in it - ADD and REPLACE. Before any change is made the script also shows a group membership for both a target and a source users. Note, the script only processes those distribution groups that are managed in the cloud. If you have some groups synced with Active Directory, those should be processed separately. USE CASE #1 - ADD When Add is chosen, the scripts only adds distribution groups of the source user to the target user's list. Use this part of the script when a target user assumes new responsibilities that another user has but keeps the old responsibilities as well. In other words, the target user needs to have a combination of new and old distribution groups to perform job tasks. USE CASE #2 - REPLACE Essentially, the 2nd part of the script is a combination of the 1st part…