I'm the admin of an on-premises Exchange Server. In addition to user mailboxes, I have over 1000 contacts and lots of distribution groups, consisting of user mailboxes and contact email addresses. And I set up for forwarding of incoming user emails to outside addresses, sometimes also delivering to user inboxes and sometimes not. I have full admin rights to users mailboxes. I can hide addresses from the Global Address List. Question: Can I do all of these things in Exchange Online? Related question (or maybe the same rephrased): Can I manage the Global Address List from anywhere and to the same extent I now can?