Using New Outlook on Windows for personal email, calendar, and contact management
I have the same problem. Two GMail accounts, both stopped sending and receiving from Outlook yesterday (Thursday) morning.
Running Windows 11 and the New Outlook - latest build:
Microsoft Outlook Version: 1.2025.129.300 (Production)
Client Version: 20250131002.08
WebView2 Version: 132.0.2957.140
Session ID: 7bec281c-e91a-d941-829d-d8bbc13416c5