If you manually type in the secondary connected account email address in the "From" field, the email is sent as "On behalf of" your primary Outlook.com account. If you typically use an Outlook.com account for email, this issue can occur if there are multiple aliases on the account and the 3rd party email address is the primary alias. Some customers may experience a delay when trying to create a new email address, or alias, for their Outlook.com account. This issue has been mitigated and we are continuing to monitor the issue to ensure stability. The root cause was the Outlook calendar sync fix deployment of an incorrect campaign data file, which led to false positive campaign detection. We have since reverted to the right data file and the outbound email flow has returned to a normal state.

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.You can automatically repair your Office program files to resolve such problems as Outlook freezing or not responding.Download the latest updates by visiting your antivirus software vendor's website.To check if you have received the fix, review your contact list to confirm duplicates have been removed.

General Troubleshooting Checklist

By systematically checking the above points, you can resolve the majority of Outlook send/receive errors. In summary, Outlook error codes may look intimidating, but they usually point to straightforward issues like incorrect settings, authentication requirements, or network blocks. With the appropriate adjustments – correcting server names, enabling authentication, using the right ports, and adjusting security software – your email should start flowing again .

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To learn more about how to share your feedback, see How do I give feedback on Microsoft Office. To get support in Outlook.com, click here or select Help on the menu bar and enter your query. If the self-help doesn't solve your problem, scroll down to Still need help?

Incorrect Password Prompt

These steps are provided in a specific order based on commonality and complexity. Many of these items can be automatically checked by the Classic Outlook Advanced Diagnostics troubleshooter. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Some users may not be able to empty their Deleted Items folder. If you access your Outlook.com account through the iOS Mail app, you may be repeatedly asked to enter your username and password.

Cannot edit the shared Outlook.com calendar in Outlook 2016 [WORKAROUND]

What is the most common Outlook error?

This engine, originally designed for word processing, has limitations in interpreting modern HTML and CSS techniques commonly used in email design. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device. Read how to Add your Outlook.com account to another mail app.

Users are required to fix this issue first before applying these methods. You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile. Availability has recovered, and engineers are investigating the root cause and identifying problematic servers. The team is sweeping all remaining capacity to identify and address residual issues. Customers with only a 3rd party email address set up as the username of their Microsoft Account will be asked to add a 1st party Microsoft alias to their account before accessing Outlook.com. Sometimes, the account may open without any error but late gives an error prompt when logging in.