Sending, receiving, and organizing email in Outlook.com
Hi David,
Thank you for posting, I am here to help. May i know if this account is your personal, work or school?
Are you using a personal, work or school device?
For the meantime please follow this steps see if this will help.
Check your license subscription regarding Microsoft 365 is already expired.
Go to https://account.microsoft.com/services
Log in your Microsoft account. Review the details under the Subscriptions heading. Check if your subscription already expired.
Let me know how this goes. Looking forward to helping you out. If you need more help please feel free to let me know. If the answer is helpful, please click "Accept Answer".
Best regards,
Jansher