@kristian902571
I can't set up Thunderbird to cope with 'modern authentication' on my Hotmail account, using a local Windows account on Windows 10 Thunderbird Support Forum | #fix Outlook after Windows update issues
Fix Sync Issues Between Personal & Work 365 Accounts | #troubleshoot Office 365 Sync and Login Issues
Fixes or workarounds for recent issues in classic Outlook for Windows | #solve Office 365 mailbox sync delays