Cannot Login Teams , One Driver and Offices

Question

Error Code: 53003

Request Id: [Moderator note: personal info removed]

Correlation Id: [Moderator note: personal info removed]

Timestamp: 2026-02-27T11:04:00.032Z

App name: Microsoft Office

App id: [Moderator note: personal info removed]

IP address:[Moderator note: personal info removed]

Device identifier: Not available

Device platform: macOS

Device state: Unregistered

Flag sign-in errors for review: [Moderator note: personal info removed]

If you plan on getting help for this problem, enable flagging and try to reproduce the error within 20 minutes. Flagged events make diagnostics available and are raised to admin attention.

Answer 1

Please note that this forum is a public platform, so we’ve adjusted your question to hide your organization’s domain name. For future posts, kindly avoid sharing any personal or organizational details to help protect your data. 

---

Hello @Xie, Sherman

Welcome to the Q&A Community! 

Thank you for contacting us. I’ve reviewed the sign‑in details you provided, and I can confirm that Error Code 53003 occurs when your sign‑in is successful but is blocked by your organization’s Conditional Access policies. This typically means that the conditions required to access Microsoft Office weren’t met during the attempt. 

In your case, the sign‑in logs indicate the device is reporting as Unregistered on macOS. When a device doesn’t meet the organization’s expected trust or compliance requirements, Conditional Access policies may block token issuance.  

Here are the most common factors that lead to this specific block: 

1. Device State: Your device shows as Unregistered, which frequently triggers Conditional Access blocking for organizations enforcing device compliance or registration.  
2. Conditional Access restrictions: Policies may require: 
   • A registered or compliant device 
   • A specific IP location or network 
   • Updated apps or OS versions 
   • Supported browsers or authentication flows 

 Hence, I recommend the followings: 

1. Contact Your IT/Entra ID Administrator 

Your admin will need to review the sign‑in logs for your account in: Entra admin center > Entra ID > Monitoring & health > Sign-in logs. 

This will show which specific policy blocked your attempt.  If the block is based on device trust, they may need to update the policy or confirm whether your device meets requirements.    

For more details, please refer to Conditional Access and Microsoft Entra activity logs - Microsoft Entra ID | Microsoft Learn

2. Register or Enroll Your macOS Device (If Required) 

Since the system currently reports your device as unregistered, your organization may need you to: 

• Enroll the device via Microsoft Intune Company Portal, or 
• Register the device in Entra ID 

This ensures the device satisfies trust or compliance conditions. 

 3. Ensure Office and macOS Are Fully Updated 

Out‑of‑date applications or macOS versions can also trigger CA blocks. Updating Microsoft Office and macOS system software can help ensure compatibility with authentication requirements.    

4. Check Your Network or Sign‑in Location 

If your organization restricts access by region or IP range, signing in from a new or unsupported location may cause this error.   

 Let me know how it goes on your end or if you need further assistance.  

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".  

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 2

Error code 53003 indicates a sign-in failure due to Microsoft Entra ID (Azure AD) authorization or conditional access, often related to device state, location, or other policy conditions. The sign-in details show:

• Device platform: macOS
• Device state: Unregistered
• App: Microsoft Office (affects Teams, OneDrive, Office apps)

This typically means a conditional access or security policy is blocking sign-in from this device.

Action steps for the organization’s Microsoft 365/Entra administrator:

1. Enable diagnostic flagging and reproduce
   • Follow the guidance in the error message to enable flagging for sign-in errors.
   • Reproduce the sign-in within 20 minutes so detailed diagnostics appear in the sign-in logs.
2. Check Entra sign-in logs for this failure
   • In Microsoft Entra admin center, open Sign-in logs and search using the provided Request Id, Correlation Id, or Timestamp.
   • Review the failure details to see which Conditional Access policy or control caused the 53003 error.
3. Review Conditional Access policies
   • Look for policies that:
     • Require a compliant or hybrid-joined device.
     • Block macOS or unregistered devices.
     • Restrict access by location, client app, or sign-in risk.
   • Since the device state is Unregistered, any policy requiring a compliant/registered device will block this sign-in.
4. Fix options (admin decision)
   • Either:
     • Register or enroll the macOS device so it becomes compliant/known to Entra ID, or
     • Adjust Conditional Access policies to allow access from this macOS/unregistered device (if acceptable per security requirements), or
     • Create an exception (e.g., exclude this user or group) in the blocking policy.
5. If Teams-specific policies are involved
   • If a Conditional Access policy is scoped specifically to Teams or Office apps, review it in light of the guidance under Conditional Access policies for Teams referenced in the documentation.
6. If the issue persists
   • After adjusting policies or registering the device, try sign-in again.
   • If still failing, collect updated sign-in logs and open a support request with Microsoft, providing the error code (53003), Request Id, Correlation Id, and timestamp.

For end users: contact the organization’s IT admin with the full error details (code 53003, Request Id, Correlation Id, timestamp, device platform/state). Only the admin can change Conditional Access or device registration settings.

---

References:

• Resolve sign-in errors in Teams
• Why am I having trouble signing in to Microsoft Teams?
• Troubleshoot Teams sign-in issues on Surface Hub