It allows you to determine if your connection to the Exchange server is lost, and also shows where exactly that happened. See the Mailbox-related Issues section below for more informationĪ trace route is a function that traces the path from one network to another. In the case of a large mailbox, it is strongly recommended to back up mailbox data periodically to avoid increasing Outlook cache and its corruption. Before emptying the cache, you may want to back up your Outlook information. Emptying the cache replaces the contents of the folder with the latest items from the Exchange server. To do it: open up Outlook > right-click the desired folder and scroll down to Properties > select Empty Cach e on the General tab.Ĭaution:The following procedure deletes any information that is not synchronized with the Exchange server, including your contacts' mail certificate. Users can empty this cache so Outlook can download all the items from your Exchange account again. If the cache becomes corrupted, it will cause synchronization issues in Outlook. Unlike Outlook for Windows, Outlook for Mac 2011/2016/2019/2021 and Microsoft Outlook for Mac for Office 365 for Mac always runs in Cached Mode and it is not possible to switch it to Online Mode. Sometimes Outlook may go to Work Offline status when there are intermittent issues with the Internet connection

Make sure that the Work Offline mode is turned off in the affected Outlook for Mac: select Outlook in the upper right > Work Offline > there will be a checkmark next to Work Offline when you are in Offline Mode, uncheck it.

Important: Tests should be run on the affected computer while the user is experiencing connectivity issues. To troubleshoot connectivity issues locally in Outlook, follow the steps listed below one by one and see if the problem persists after each step. Keep the number of subfolders in Inbox and Sent Items to minimum.Verify identity configurations (applies to Outlook 20, will check on VM) are entered correctly.If an issue is not reproducible in OWA, then it is local in Outlook and can be caused due to the following reasons:

Microsoft outlook identity keychain