Error 80090016 or 80090030 TPM Keyset errors: 1. Log off affected user 2. Log on as different user 3. Run CMD with elevated/admin perms 4. Rename these folders: C:\users\$dir\AppData\Local\Packages\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy C:\users\$dir\AppData\Local\Packages\Microsoft.AccountsControl_cw5n1h2txyewy 5. Log back on as affected user 6. Open an Office 365 app 7. Walk through MFA/device