
Simply putting the password in here and clicking the save button got everything working properly again. Just close all O365 apps and run the tool, then try to open new word file first and provide your login data, after that open the outlook and test the performance. But, in the Mac Mail > Preferences > Accounts dialogue window, I found that there was no password in the Outgoing Mail Server section of both accounts (click on desired account then on Server Settings). Also, the software supported Mac OS X 10.18 or above versions. It is an automated tool that simply converts the mailbox data of Office 365 in Mac Mail supported file format (MBOX). you can also use this tool to claer you license without deinstalling the outlook app, and will not imapct negative. Quick Tip: This article highly suggested Office 365 Mac Backup software for those users who just configure Office 365 email on Mac Mail for the sake of O365 backup on the local system.The process then proceeds to reinstall all deleted content from the Mail server. Rebuilding the Mailbox on your Mac ensures that the messages and attachments stored in Mac, along with your other apps are deleted first. If this is only a bug in the iOS or macOS update package, restarting all of your devices could fix the problem.

First of all clear all outlook caches. Restart your Mac and launch Mail to check if the problem has been resolved. Turn off all of your iOS and iPad devices and check if your Exchange account works as intended on your Mac.This is one of the most outlook common issue, so please try following technical steps:
