How to fix Outlook error code 80090016

If you are encountering error code 80090016 on Outlook, fret not; we're here to help.

Outlook error code 80090016 can be really annoying, just like error code 503. It can stop you from sending emails and complting important tasks in Outlook. If you've faced this problem before, you understand the urgency of finding a solution.

In this guide, we'll walk you through the steps to diagnose and fix error code 80090016, ensuring that you can get back to using Outlook smoothly and efficiently.

How to fix Outlook error code 80090016

To fix Outlook error code 80090016, you can try deregistering your device from Azure Active Directory (AAD) and then re-registering it. Many Redditors have reported success with this method.

Here are the detailed steps to fix Outlook error code 80090016:

• Launch Command Prompt as an administrator and type the following command: dsregcmd /leave
• Type the command dsregcmd /status in a Command Prompt, and make sure the value for the "AzureAdJoined" parameter is "No"
• Now, to re-register, run the Task Scheduler as an administrator
• Go to Task Scheduler Library > Microsoft > Windows > Workplace Join and manually start the task “Automatic-Device-Join“
• Type the command dsregcmd /status in a Command Prompt, and see if the value for the "AzureAdJoined" parameter has changed to "Yes"

After completing these steps, simply reboot your PC, and you should be all set. If you encounter any problems during the process or if the issue persists, we suggest referring to the steps outlined in this Reddit thread for further assistance.

What is Outlook error code 80090016?

The Outlook error code 80090016 indicates an authentication failure due to some issues with your computer's Trusted Platform Module (TPM).

For those unfamiliar with TPM, it's a hardware component that provides a secure environment for various cryptographic operations. It protects the integrity of your Outlook data and the security of your email communication.

Error code 80090016 often surfaces after a motherboard replacement, and it's worth noting that this issue may extend beyond just Microsoft Outlook. You might encounter this error in other Microsoft Office applications like Teams and OneDrive as well.

We hope our guidance has helped you fix Outlook error code 80090016. Now that you're back on track, why not learn how to set an automatic "Out of Office" reply in Outlook?