TPM Issues Impacting Microsoft 365 (Office 365) Sign-In

TPM Issues Impacting Microsoft 365 (Office 365) Sign-In

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.