KB ID 0001549

Problem

When attempting to open Outlook you see this error;

Something went wrong
Your computer’s Trusted Platform Module has malfunctioned. If this error persists, contact your system administrator with this error code 80090016

Note: The this won’t affect users who are subject to MFA (Multi Factor Authentication,) so this can be enabled to solve this problem. 

Solution One Code 80090016

On the affected machine navigate to;

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C:\users\%username%\AppData\Local\Packages\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy

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Rename that folder to Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy.old 

The log out and back in again.

Solution Two Code 80090016

WARNING: This involves disabling modern authentication, do not consider this a fix, it’s more of a work around, that will stop working in or around November 2019, when modern authentication is manditory.

On the affected machine, run regedit and navigate to;

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HKEY_CURRENT_USER > Software > Microsoft > Office > 16.0 > Common > Identity

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Create a new DWORD (32 Bit) Entry

• Name: EnableADAL
• Value: 0 (that’s a Zero)

What does this do?: It disables ‘Modern Authentication’.

Then restart Outlook. (Note: It may re-prompt for a password).

Related Articles, References, Credits, or External Links

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