Just to understand the requirements, are you asking for a report which will list all AD (on-premise) users which have a proxy which is shared by multiple users?
Yes that is right. Example, if two people have firstname.lastname@domain.com. I can do this for mail, but proxy attribute are multivalued and store with SMTP:email or smtp:email or sip:email
Not working. I have ran it multiple times and pick the smtp it said has duplicate, query the domain and cant find the duplicates. Hows the result populated? I have DisplayName and proxy address, are the proxy address the duplicates it found? I dont need MailNickname on the left because we are not using that attribute.
