TPM Issues Impacting Microsoft 365 (Office 365) Sign-In
Objective
To provide step-by-step guidance to resolve
TPM-related issues affecting Microsoft 365 application sign-ins.
Scope
Applicable to Windows 10/11 devices that
are Azure AD joined or Hybrid Azure AD joined.
Issue Description
Users may face sign-in failures, repeated
password prompts, or TPM-related error codes.
Root Cause Analysis
Common causes include corrupted TPM keys,
Windows/BIOS updates, password resets, or Azure AD token corruption.
Prerequisites
Local admin access, BitLocker recovery key
backup, and confirmed web login access.
Step-by-Step Resolution Procedure
Preliminary Checks
- Verify Office 365 web login
- Sync system time/date
- Apply Windows updates
- Restart device
Reset Work/School Account
- Settings > Accounts > Access work
or school
- Disconnect account
- Restart and reconnect
Clear TPM (Primary Fix)
- Run tpm.msc
- Select Clear TPM
- Restart system
Re-register Device
- Run dsregcmd /leave
- Restart and rejoin Azure AD
Post-Verification
Ensure Outlook, Teams, OneDrive sign in
successfully.
Notes & Precautions
Backup BitLocker keys before clearing TPM.