Hi again,
Sorry for the confusion, you can try this troubleshooting steps by Prince in the thread https://answers.microsoft.com/en-us/msoffice/forum/all/not-able-to-log-in-microsoft-defender-in-osx-after/fb3bceae-373a-4f41-bc14-ba0562673d6d
"Let’s troubleshoot this issue together. Here are some steps you can try:
Check Internet Connection:
Ensure that your internet connection is stable.
Sometimes login issues occur due to network problems.
Update Microsoft Defender:
Make sure you have the latest updates installed for Microsoft Defender.
Go to the App Store and check for any available updates.
Restart Microsoft Defender:
Quit the Microsoft Defender app.
Reopen it and try logging in again.
Reset Microsoft Defender:
If the issue persists, you can try resetting the app.
Right-click on the Microsoft Defender icon in the Dock.
Choose Options and then Reset.
Reopen the app and try logging in.
Check System Preferences:
Go to System Preferences > Security & Privacy.
Click on the Privacy tab.
Ensure that Microsoft Defender has the necessary permissions (such as Full Disk Access)."
Let me know if it helps or not.