This article will serve as a landing spot for common issues that have been identified with the migration from Exchange to Exchange Online, as well as help articles for FAQ's. If something you are experiencing isn't listed, please create a ticket with the OIT Service Desk. Please note that the directions for Mac and Windows pertain to issues specifically in Microsoft Outlook clients.
Disclaimer - If you utilize third-party software with a connection to Microsoft Exchange, such as Calendly, you might need to remove the connection and re-add using instructions for Microsoft 365.