I have trouble log in to my outlook account on both mobile app and browser

Hi Sharon (Jiaqi) Lu,

Good day. I'm Jhun an independent advisor. In regards with your Outlook login issue with "Error 500-OWA (Outlook Web App), this means your Outlook account exists, but it does not have an active mailbox or license assigned to it.

Below are the possible fixes you can try.

A. For Personal Outlook.com account, this error is rare, but it can happen if the mailbox is corrupted or not provisioned.

1. Go to: account.microsoft.com and Sign-in
2. Check:
   Services & subscriptions. Your email address type (@outlook.com, @hotmail.com, etc.).
3. If Sign-in works but Outlook still fails > contact Microsoft Support.
4. To contact, go to: https://support.microsoft.com.
5. Click Contact Support
6. Choose: -Product: Outlook -Issue: Sign-in / Mailbox
7. Request chat or call, and tell them the log-in issue.

B. For Work or School account. Your Microsoft 365 admin has the control for the fix and tell them your log in issue in full detail. For your admin reference here are the steps:

1. Microsoft 365 Admin Center.
2. Users > Active users > Your account.
3. Licenses > Enable Exchange Online.
4. Wait 15–60 minutes after assigning.

I hope this helps.

Regards,
Jhun