How do I open another users mailbox from within Outlook? Before you start please make sure you have the appropriate permissions assigned. If you are not sure or need to know how to do this please refer to this article. https://www.opsactive.com/office-365-give-permission-on-a-mailbox/ In the left had side of your outlook pane, look for your username/email address, this is the very top level of your …
