Microsoft 365 Error Codes

How to Fix Trusted Platform Module Error 80090016 in Microsoft 365

Elise Williams Oct 10, 2026 869 views

Question details

The user is experiencing an authentication failure in Outlook and OneDrive due to a Trusted Platform Module (TPM) error after a recent laptop update.

How to Fix Trusted Platform Module Error 80090016 in Outlook and OneDrive

Product: Microsoft Outlook and OneDrive
Device & OS: not provided
Scenario: Attempting to connect or authenticate accounts in Microsoft 365 applications following a system software update.
Observed behavior: Outlook and OneDrive fail to connect to user accounts and display the Trusted Platform Module Error 80090016.

Before you start

Ensure you have your BitLocker recovery keys and Microsoft account credentials securely saved before accessing or modifying any BIOS and TPM settings.

Solution 1Recommended

Verify and Reset TPM Settings in BIOS

A simple system restart combined with disabling and re-enabling the TPM in your BIOS often resolves temporary authentication glitches.

Windows uses the TPM chip to securely store authentication tokens for Microsoft 365. When an update disrupts this connection, toggling the TPM state can force the system to re-establish trust.

Restart your computer

First, perform a standard system restart to clear any temporary software glitches that might be causing the error.

Access BIOS/UEFI settings

If the error persists, reboot your computer and press the designated key (usually F2, F12, DEL, or ESC) during startup to enter the BIOS menu.

Locate TPM configuration

Navigate to the Security or Advanced tab within the BIOS and locate the Trusted Platform Module (TPM) settings.

Toggle the TPM state

Confirm that TPM is enabled. If it is already enabled, temporarily disable it, save your changes, restart, enter the BIOS again, and re-enable it.

Crucial Warning: Do not select the option to clear or replace the TPM chip unless you have explicitly confirmed your recovery keys and backed up your data, as this can lead to permanent data loss.

Solution 2

Update System BIOS and Firmware

Outdated or incompatible firmware can cause communication issues between the TPM and Windows, triggering error 80090016.

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Frequently Asked Questions

Does error 80090016 mean my TPM hardware is broken?

Not necessarily. In most cases, error 80090016 is caused by a software glitch or a firmware mismatch after a system update, and can be resolved by updating the BIOS or resetting TPM settings in the UEFI menu.

Can I just clear my TPM to fix Microsoft 365 login issues?

Clearing the TPM is a drastic step that can result in data loss if you do not have your BitLocker recovery keys or account credentials backed up. It should only be done as a last resort under the guidance of a qualified technician.

Why do Outlook and OneDrive rely on the Trusted Platform Module?

Microsoft 365 applications use the TPM chip to securely store authentication tokens and encryption keys. If Windows cannot communicate properly with the TPM, these applications will fail to verify your identity and block access.

Where can I find my BitLocker recovery key before modifying TPM settings?

You can usually find your BitLocker recovery key by logging into your Microsoft account online from another device and checking the 'Devices' section, or on a printout or USB drive you saved when first setting up your PC.

Microsoft Office Error Codes