If selected, unselect it and check if the synchronization is better now.
Go to the Outlook menu and check if the Work Offline option is selected or not. It is the most basic check that you can perform before pursuing any other method. Read Also: What Outlook for Mac Users can do when their Exchange mailbox is full? Fix Exchange synchronization issues in Outlook for Mac Now, as you have got the main reasons behind the issue, we will provide you some ways to get out of this issue. Many users of Outlook for Mac face this issue, and so we need to realize the causes behind it. Prominent Reasons Behind this Synchronization Issue Due to this, mailboxes are not updated on the server-side and on the client-side, and it becomes necessary to fix Outlook for Mac not syncing with the Exchange Server. Sometimes, this synchronization process gets affected partially or fully. Synchronization between the server and client application is done so that whenever there is any modification in the Server-side or client-side, the change gets updated on the other side as well. It facilitates offline working in an Exchange environment.
Outlook for Mac provides Exchange connectivity in a Mac environment.
