Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

Thunderbird by POP doesn´t syn with Microsoft server

  • 1 freagra
  • 1 leis an bhfadhb seo
  • 33 views
  • Freagra is déanaí ó Miguel
  • Réitithe

Today, Thunderbird is not syncing with the Office server. Accounts configured as POP. This happens to all accounts on all computers.

The RETR command was not completed successfully. Error retrieving the message. The mail server outlook.office365.com responded: Server Unavailable. 21

Today, Thunderbird is not syncing with the Office server. Accounts configured as POP. This happens to all accounts on all computers. The RETR command was not completed successfully. Error retrieving the message. The mail server outlook.office365.com responded: Server Unavailable. 21

Réiteach roghnaithe

After 24h, It seems that everything is working again. I suppose Microsoft has fixed its error. Thanks

Read this answer in context 👍 0

All Replies (1)

Réiteach Roghnaithe

After 24h, It seems that everything is working again. I suppose Microsoft has fixed its error. Thanks