I'm really hoping some smart soul out there has a solution to this head scratcher. I'm using a brand new MS Surface Book, Windows 10. On the Mail app I can't get my iCloud email to work. I get either the error above after attempting to sync, or this:
"We're having a problem downloading messages. Make sure you have a connection and your account info is correct, and then try again. Error code: 0x801901f5"
My ID and password are correct. I've spent 2 days removing and adding my email, reinstalling the app (used PowerShell), Googling for help and checking config settings, access via Windows Firewall (I'm not an AVG or Windows Defender user) and making sure my privacy settings allow access to Mail and Calendar.
No joy. Does anyone have a fix?