How to Fix the Error 500 in Outlook?

You may encounter the error 500 in Outlook due to an internal server error, which indicates a problem originating from the server’s side. This issue can also be caused by having too many roles assigned to your user account or by issues with your internet connection.

Image showing error code 500.

Continue reading the guide to equip yourself with the knowledge needed to resolve this error. Keep in mind that these solutions are temporary, as the error may recur when you try to access Outlook again.

Before you begin, try logging out and logging into your Outlook account again as doing this simple step resolved this error for many users.

1. Check Microsoft’s Service Health

To determine if the error is due to a Microsoft service outage, visit the Service Health panel. If a Microsoft service is down, you must wait until it is fully restored.

  1. Visit and sign in to your account.
  2. Select the Health tab.
  3. From the dropdown menu, choose the Service Health option.
  4. Here, you can see which services are currently degraded and which are functioning correctly. Any service experiencing issues will be flagged under advisories.

Image showing Microsoft service health panel.

2. Remove Excessive User Permissions

The error can also occur if a user has too many administrator roles assigned, which can cause endless browser redirects. You can correct this by removing some permissions.

If you are not an admin, contact the admin managing your Microsoft 365 subscription and request the removal of all admin roles except for Global Administrator. If you are the Global Administrator, you can make these changes yourself.

  1. Log in at
  2. Click on the app launcher in the top left and select Admin.
  3. "Admin" highlighted in the app center of Microsoft office.Select the user experiencing the issue.
  4. Click on Manage roles.
  5. Uncheck all roles except for Global Administrator and save your changes.
    Image showing the roles within the admin panel.

3. Use Microsoft’s Diagnostics Tool

The Microsoft Support and Recovery Assistant is a diagnostic tool that can help troubleshoot problems with a wide range of applications.

  1. Download the tool from the official website at this link.
    Showing the site where you can download the Microsoft Diagnostic Tool.
  2. Uncompress the downloaded file and install the tool. Once installed, open it.
  3. Select the “Outlook on the web” option and click on the Next button.
    Image displaying options in the Microsoft Diagnostic tool with 'Outlook on the web' highlighted.
  4. Choose “I can’t run Outlook on the web” and click the Next button.
    'I can't run Outlook on the web' option is highlighted in the image.
  5. Confirm if the device you are using is affected by selecting Yes and then click the Next button.

Image showing 'Yes' or 'No' option on the Microsoft Diagnostic tool.

You’ll be prompted to log in to your account to commence the troubleshooting process.


Kevin Arrows

Kevin Arrows is a highly experienced and knowledgeable technology specialist with over a decade of industry experience. He holds a Microsoft Certified Technology Specialist (MCTS) certification and has a deep passion for staying up-to-date on the latest tech developments. Kevin has written extensively on a wide range of tech-related topics, showcasing his expertise and knowledge in areas such as software development, cybersecurity, and cloud computing. His contributions to the tech field have been widely recognized and respected by his peers, and he is highly regarded for his ability to explain complex technical concepts in a clear and concise manner.