Microsoft have announced they are having yet more issues with their platform
this issue seems to be affecting Private consumers not users on business platforms:
Title: Some users may be unable to access Microsoft 365 services
User impact: Users with Microsoft 365 Family subscriptions may be unable to access Microsoft 365 services.
Current status: We’re reviewing service telemetry and recent changes within the service to isolate the source of the issue.
Next update by: Thursday, April 10, 2025, at 3:30 PM UTC
We advise users to simply sit tight and this will sort itself out.