How to fix 500 - Internal Server Error in Outlook?

Issue: Hello. I can access all the other Microsoft products, such as Office 360 and OneDrive. However, every time I try to access Outlook, I receive the Internal Server Error 500. It stops me from using my email entirely. Please help.

Solved Answer

Outlook is an email service and personal information manager provided by Microsoft. The contents of emails can be accessed via the standalone application that comes in a package of MS Office and also via the web browser on a dedicated Outlook email website. Many people choose this service because of its popularity and convenience, and it's especially prevalent in the corporate environment.

Just like any other Windows application or service, it does not always function as intended – Error 500 in Outlook is one of such issues. Users across various IT support forums claimed that they are unable to access their emails due to this error, which can be extremely frustrating. Some users might also receive a different text message, which includes:

  • Unexpected Error
  • Mailbox not found
  • Something went wrong
  • Repeating redirects detected
  • Protocol disabled.

The issue seems to be relatively inconsistent, as users claimed that their second email accounts worked perfectly fine, or that accessing Outlook email on another device resolved the issue. As usual, there are no two used devices that are exactly the same, which means that numerous components work together, creating inconsistencies or bugs.[1]

How to fix 500 - Internal Server Error in Outlook?

In most cases, the issue is caused by corrupted cache files, although other problems, such as poor internet connection, might also be at fault. Below we will provide several methods that should help you fix Outlook error 500 in numerous ways. Keep in mind that each of the devices is different, hence you might need to check several methods until one works for you.

Tip: If you would like to resolve Windows issues easily, we recommend employing FortectMac Washing Machine X9 PC repair software. It can easily find corrupted system files and replace them with brand new, authentic ones. As a result, you could automatically get rid of Blue Screen errors, system crashes, DLL errors, registry[2] issues, and more.

Solution 1. Run the troubleshooter

If there's something wrong with the Outlook app itself, the troubleshooter should point at the problem.

  • Type troubleshoot in Windows search and hit Enter
  • On the right side of the window, pick Additional Troubleshooters
  • Scroll down and select Windows Store Apps
  • Click Run the troubleshooter Run the troubleshooter
  • Wait for the scan to finish
  • Apply the offered fixes and see if the matter is resolved.

Solution 2. Temporarily disable or uninstall third-party anti-virus

Fix it now! Fix it now!
To repair damaged system, you have to purchase the licensed version of Fortect Mac Washing Machine X9.

Any kind of software that could interfere with your online connection and block certain channels could prevent you from accessing your Outlook email. Therefore, we recommend you temporarily disable or uninstall your third-party anti-virus and see if that helps. Third-party firewalls, VPNs,[3] and similar software could also cause disruptions.

Solution 3. Clean cookies and cached files

If you can't access your Outlook account via the browser, caches may be bugged. Cleaning them would resolve the issue.

Google Chrome

  • Click on Menu and pick Settings.
  • Under Privacy and security, select Clear browsing data.
  • Select Browsing history, Cookies and other site data, as well as Cached images and files.
  • Click Clear data. Clear Chrome cache

Mozilla Firefox

  • Click Menu and pick Options.
  • Go to Privacy & Security section.
  • Scroll down to locate Cookies and Site Data.
  • Click on Clear Data…
  • Select Cookies and Site Data, as well as Cached Web Content, and press Clear.

MS Edge (Chromium)

  • Click on Menu and go to Settings.
  • Select Privacy and services.
  • Under Clear browsing data, pick Choose what to clear.
  • Under Time range, pick All time.
  • Select Clear now. Clear MS Edge cache


  • Click Safari > Clear History…
  • From the drop-down menu under Clear, pick all history.
  • Confirm with Clear History.

Solution 4. Reset your internet connection

Fix it now! Fix it now!
To repair damaged system, you have to purchase the licensed version of Fortect Mac Washing Machine X9.
  • Type cmd in Windows search
  • Right-click on Command Prompt result and pick Run as administrator
  • Paste in the following commands (press Enter every time):
    ipconfig /flushdns
    ipconfig /registerdns
    ipconfig /release
    ipconfig /renew
    netsh winsock reset
  • Restart your PC. Reset internet

Solution 5. Use different DNS

If resetting the connection didn't work, you could try using different DNS settings.

  • Right-click on Start and pick Network Connections
  • Under Advanced network settings, pick Change adapter options
  • In the Network Connection window, right-click on your main connection (for example, Ethernet) and select Properties
  • Select Internet Protocol Version 4 (TCP/IPv4) and click Properties below
  • Click Use the following DNS server address and type the following into the fields:
    Preferred DNS server:
    Alternate DNS server:
  • Press OK. Change DNS

Solution 6. Allow Outlook on the web

Fix it now! Fix it now!
To repair damaged system, you have to purchase the licensed version of Fortect Mac Washing Machine X9.

If the email service works fine via the app but is failing when accessing it via the browser, make sure that permissions are set correctly.

  • Open your browser and log in to your Office account using your credentials
  • Pick the Mail option and then select Manage email apps
  • Make sure Outlook on the web option is ticked.

Solution 7. Wait

In some cases, the problem might be on Microsoft's end. Servers operating the email service might sometimes go on maintenance or experience technical difficulties. Therefore, if none of the solutions above helped you, you should wait some time and see if Outlook error 500 resolves automatically – it did for many people who had this issue.

Repair your Errors automatically team is trying to do its best to help users find the best solutions for eliminating their errors. If you don't want to struggle with manual repair techniques, please use the automatic software. All recommended products have been tested and approved by our professionals. Tools that you can use to fix your error are listed bellow:

do it now!
Download Fix
do it now!
Download Fix
Compatible with Microsoft Windows Compatible with OS X
Still having problems?
If you failed to fix your error using FortectMac Washing Machine X9, reach our support team for help. Please, let us know all details that you think we should know about your problem.
Fortect - a patented specialized Windows repair program. It will diagnose your damaged PC. It will scan all System Files, DLLs and Registry Keys that have been damaged by security threats.Mac Washing Machine X9 - a patented specialized Mac OS X repair program. It will diagnose your damaged computer. It will scan all System Files and Registry Keys that have been damaged by security threats.
This patented repair process uses a database of 25 million components that can replace any damaged or missing file on user's computer.
To repair damaged system, you have to purchase the licensed version of Fortect malware removal tool.To repair damaged system, you have to purchase the licensed version of Mac Washing Machine X9 malware removal tool.

Protect your online privacy with a VPN client

A VPN is crucial when it comes to user privacy. Online trackers such as cookies can not only be used by social media platforms and other websites but also your Internet Service Provider and the government. Even if you apply the most secure settings via your web browser, you can still be tracked via apps that are connected to the internet. Besides, privacy-focused browsers like Tor is are not an optimal choice due to diminished connection speeds. The best solution for your ultimate privacy is Private Internet Access – be anonymous and secure online.


Data recovery tools can prevent permanent file loss

Data recovery software is one of the options that could help you recover your files. Once you delete a file, it does not vanish into thin air – it remains on your system as long as no new data is written on top of it. Data Recovery Pro is recovery software that searchers for working copies of deleted files within your hard drive. By using the tool, you can prevent loss of valuable documents, school work, personal pictures, and other crucial files.

About the author
Ugnius Kiguolis
Ugnius Kiguolis - The problem solver

Ugnius Kiguolis is the founder and editor-in-chief of UGetFix. He is a professional security specialist and malware analyst who has been working in IT industry for over 20 years.

Contact Ugnius Kiguolis
About the company Esolutions


What you can add more about the problem: "How to fix 500 - Internal Server Error in Outlook?"