For more information on creating a new email profile, see Create an Outlook profile. To start Outlook in safe mode, press the Windows key on your keyboard. In the search box, type outlook.exe /safe, then press Enter. Repairing is a simple process but may take as long as half an hour to complete.

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. You can start Outlook in safe mode, disable your add-ins, and then try to open Outlook normally. Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem. For a short intro about how to access and read the Event Viewer in Windows, see this Quick Tip. If these methods dose not work, you can also try a third party tool, Kernel for Outlook PST Repair tool. If anyone finds a more permanent solution, I would appreciate it.

If the prompts go away, you'll know it was the antivirus software. Check your settings to see if you've got the "always prompt for password" feature enabled. It could be as simple as an out-of-date version of Outlook's software. Once an update has been run on your system, the bug may be rectified. You should Fix Outlook official help be able to go to Outlook via a web browser and reset your password.

Out-of-date software and corrupted Outlook profiles are two of the most common issues that can prevent you from sending and receiving email. If you're an admin with multiple users reporting problems, you also should check for service issues with Microsoft 365. This kind of error usually indicates some issues on the disk where your Outlook PST file is located. It can be caused due to improper installation of a program, corruption in the hard drive or registry file, etc. This has nothing to do with the email client