The Microsoft error Code 80090016 is experienced by users whenever the Trusted Platform Module (TPM) malfunctions.

Surefire fixes to solve this issue and get your apps working again

  • Error code: 80090016 is displayed when the TPM is corrupted.

  • You can resolve this Microsoft issue by editing the AAD.BrokerPlugin folder and/or tweaking the Registry.

  • Another effective solution for the TPM keyset does not exist error is to delete the affected work or school account and create a new one.

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  • Click Start Scan to find Windows 11 issues that could be causing PC problems.

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This Module technology, according to Microsoft, is designed to provide hardware-based and security-related functions.

If the TPM malfunctions or is corrupted, some Windows components may not perform as expected. The micro-controller would be unable to successfully execute system security integrity measurements and key creation and use.

Read on to find out how to fix the TPM error 80090016 on both Windows 10 and Windows 11.

What does the Microsoft error code 80090016 mean?

The Outlook error code 80090016 is caused by a corrupted or malfunctioning TPM. This can be caused by various factors, as shown below:

  • System board replacement: If you are getting the Outlook error code 80090016 Keyset does not exist, it is likely because you have recently replaced your system board. This causes the authentication tokens generated by the TPM not to match the folders created initially. The solution here is to rename the folders.
  • Issues with a user account: If you use a work or school account with Outlook, some problems with the account might lead to this issue. You can fix this by deleting the affected user account.
  • Problems with the Outlook app: Sometimes, the Outlook app might malfunction. You might need to uninstall the app using one of the best uninstaller software.

Why is my TPM corrupted?

Most of the time, the TPM error is displayed because of interference with the PC Health Checkup. This application is responsible for alerting you about your system’s compatibility with software, such as checking if you have the required resources for Windows 11.

It is also possible to get the keyset does not exist Office 365 error when malware infects your computer.

How can I fix error code 80090016?

1. Delete the contents of the Ngc Folder

  • Close Outlook.
  • Open File Explorer.
  • Copy and paste the path below into the Address Bar:C:\Windows\ServiceProfiles\LocalService\AppData\Local\Microsoft\NGC
  • Delete all contents of the displayed folder.

2. Delete work or school account

  • Press the Windows key + I and select Accounts in the left pane.
  • Select the Access work or school option.
  • Now, click the Disconnect button in front of the affected account.

Sometimes, the Outlook error code 80090016 or even on OneDrive and MS Teams can be due to a faulty work or school account. You can fix this by deleting the said account. After deleting the account, you can create a new one on your Windows 11 PC.

  • What does the Microsoft error code 80090016 mean?
  • Why is my TPM corrupted?
  • How can I fix error code 80090016?
    1. Delete the contents of the Ngc Folder
    1. Delete work or school account
    1. Rename the AAD.BrokerPlugin folder
    1. Uninstall and reinstall Outlook

Some PC issues are hard to tackle, especially when it comes to corrupted repositories or missing Windows files. If you are having troubles fixing an error, your system may be partially broken. We recommend installing Restoro, a tool that will scan your machine and identify what the fault is.Click here to download and start repairing.

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3. Rename the AAD.BrokerPlugin folder

  • Sign in to your PC with another administrator account.
  • Launch Run by pressing the Windows + R simultaneously.
  • Type the command below and press the Shift + Enter keys:C:\Users%username%\AppData\Local\Packages
  • Scroll to find Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy folder.
  • Copy the folder by pressing Ctrl + C keys and paste it to Home Screen by pressing Ctrl + V keys. This is for backup.
  • Go back to the Packages folder and rename the Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy folder to Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy.old.
  • Go back to the affected user account and relaunch Outlook.
  • Select Yes to Allow my organization to manage this device if you get the Organization Prompt.
  • In case the Error Code 80090016 Office 365 reappears, ignore it this time and continue your use of Outlook.

If you are having issues switching administrator accounts, our guide on changing an administrator account can help.

If your Microsoft error code 80090016 persists, try out the next solution instead.

4. Uninstall and reinstall Outlook

  • Press the Windows key and type Outlook in the Search Box.
  • Right-click on Outlook and select Uninstall.
  • You can reinstall Outlook by downloading it from Microsoft Store.

If you want to uninstall Outlook and remove its corresponding files easily, use a dedicated tool like CCleaner.

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It has a built-in uninstaller and a PC cleaner utility. This scans your whole PC for unnecessary files while being very user-friendly.

With CCleaner, you can quickly and safely uninstall any program without leaving leftover files.

We hope the TPM keyset does not exist code 80090016 has been resolved by now, and you can operate your Outlook like before. However, if the issue persists, check our guide on how to fix the keyset does not exist error.

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Give your computer a fresh cleaning to make it run smoother and errorless.

If the solution in this guide helped you solve the error code 80090016, don’t hesitate to share the tip that worked for you in the comments below.

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