Microsoft Teams error code 503 [SOLVED]

Tashreef Shareef
by Tashreef Shareef
Windows & Software Expert
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Microsoft Teams error code 503

Microsoft Teams is a popular cloud-based team collaboration software that is part of Office 365 suite of applications. Irrespective of whether you have the Office 365 license, you can install Microsoft Teams to participate in the meeting if a user with the Microsoft Teams setup invites you via email.

However, some users have reported a Microsoft Teams error code 503 while trying to sign in to their Microsoft Team desktop client. Similar issues can be seen in the Microsoft Community forum discussion page.

So I have installed the Free version of Microsoft Teams in my desktop and created a account.
Then, when I tried to log in to MS Teams I got the message  “D’oh something went wrong” Error 503. I have tried multiple times (at least 10) and still haveing the same error.

In this article, we have listed all the possible solutions to fix Microsoft Teams error code 503 in Windows computers.

How to fix Microsoft Teams error code 503?

1. Login to Microsoft Team web client

login to web web version Fix Microsoft Teams error code 503

  1. If you can’t wait to resolve the issue with your desktop client, you can use Microsoft Team’s web client which offers all the functionalities.
  2. On your browser visit
  3. Log in using your Microsoft account. Make sure you are using the email on which you have received the meeting invite.
  4. You can use the Microsoft Teams web client for the future meetings until Microsoft resolves the issue.

Bear in mind that you can use any browser for this purpose, but we suggest trying out UR Browser.

This browser is built on Chromium engine, and it’s almost identical to Chrome, but unlike Chrome, it’s not associated with Google and it won’t send your data to Google.

In addition, this browser has privacy, phishing, and malware protection built in. There’s also a an adblocker and a built-in VPN for an extra layer of security.

Skype for Business Online to be replaced by Microsoft Teams in 2021

2. Check for service issues

check for service issues Microsoft Teams error code 503

  1. If you are unable to access Microsoft Teams web client, try to download the app on your smartphone. Login using your mobile app and check if it works.
  2. If the issue persists everywhere, it could be an issue with the Microsoft Teams’ service.
  3. In this case, contact Microsoft Teams support or open a ticket for a clear understanding of the issue.

3. Clear Credential Manager

  1. If you have signed in using your personal account into Microsoft Teams instead of your work account, you may get this error.
  2. To resolve this, try to clear the Credential Manager for any credentials related to Microsoft Teams and try again.
  3. Press Windows Key + R.
  4. Type control and click OK.
  5. In the Control Panel, go to User Accounts > Credential Manager.
  6. Click on Windows Credentials tab.
    credential manager Fix Microsoft Teams error code 503
  7. Go through all the saved credentials list and click on Remove for everything that is related to Microsoft Teams.
  8. Close the Credential Manager and open the Microsoft Teams app.
  9. Try to sign in with your work account and check for any improvements.

If the issue persists, try to uninstall and reinstall Microsoft Teams. This can resolve any issues with the app.

FAQ: Learn more about Microsoft Teams

  • Why do I receive error 503?

Error 503 occurs mainly because of certain limitations in the local network. Microsoft Teams error 503 indicate there are restrictions set in place in the corporate network.

  • How do I clean up Microsoft Teams?

To clear Microsoft Teams, first quit the app. Then go to Add and Remove programs, locate Microsoft Teams and select uninstall.

However, when talking about troubleshooting the app, this should be the absolute last resort solution.

  • How do I fix Microsoft Teams login issues?

We compiled a list of tested troubleshooting solutions that you can use to fix log in problems in Teams. Follow the instructions listed in our guides to fix the issue.

Editor’s Note: This post was originally published in August 2019 and has been since updated for freshness and accuracy.