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80090016 Severity: High

Keyset does not exist (TPM)

Teams cannot start because the connection to the TPM chip fails. This affects many corporate laptops.

Last verified:

Affected systems

windows

Symptoms

  • Teams reports 80090016 on launch
  • Outlook shows the same error
  • Sign-in to other Microsoft services is broken

Possible causes

  • Corrupt NGC folder (Hello for Business)
  • TPM chip was cleared or reset
  • Device registration certificate expired

Solutions

1.Reset the NGC folder

  1. Open PowerShell as administrator.

  2. Take ownership of the NGC folder.

    takeown /f C:\Windows\ServiceProfiles\LocalService\AppData\Local\Microsoft\Ngc /r /d y

  3. Set permissions and delete the folder.

    icacls C:\Windows\ServiceProfiles\LocalService\AppData\Local\Microsoft\Ngc /grant administrators:F /t

  4. Reboot. On first sign-in the folder is recreated.

2.Check device registration

  1. Open PowerShell and check the status.

    dsregcmd /status

  2. Look for 'AzureAdJoined: YES' and 'WamDefaultSet: YES'.

  3. If those values are wrong, escalate to IT.

3.Re-create the Hello PIN

  1. Open Settings, Accounts, Sign-in options.

  2. Remove the PIN and set up a new one.

  3. Test Teams again.

If the NGC folder cannot be removed, the device often needs a fresh Entra registration. Talk to IT before clearing the TPM chip since this affects other applications too.

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