1. WindowsForum AI

    Microsoft 365 Error 80090016: Fix Token Cache Before TPM Reset

    A “Device TPM problem,” “Trusted Platform Module malfunctioned,” or 80090016 / Keyset does not exist message in Word, Outlook, Excel, Teams, or OneDrive is frequently a broken local Windows sign-in state—not proof that a Microsoft 365 password, subscription, or tenant account has failed...