Error 657rx then 4vt9f when Office 365 asks for password twice

Steps:

• Sign out of all Office apps.

• Open PowerShell as admin and run:

# wipe WAM token caches
Remove-Item -Path "$env:LOCALAPPDATA\Packages\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\AC\TokenBroker\Accounts\*" -Recurse -Force
Remove-Item -Path "$env:LOCALAPPDATA\Packages\Microsoft.Windows.CloudExperienceHost_cw5n1h2txyewy\AC\TokenBroker\Accounts\*" -Recurse -Force

• Reboot, launch Word, and sign in again.

The TokenBroker folders rebuild clean and the 657rx / 4vt9f prompts disappear.

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REFERENCES

• https://www.troublefixers.org/question/error-657rx-then-4vt9f-when-office-365-asks-for-password-twice