Outlook doesn’t support the connection encryption type [FIX]


Tashreef Shareef
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Fix outlook does not support the connection encryption type

Outlook users are reporting Outlook does not support the connection encryption type error after installing a new update for Windows OS and the Microsoft Office 2010 and above.  This error prevents the user from sending and receiving email on their Outlook client.

Since this error is so problematic, today we’ll show you how to fix it.


What to do if Outlook does not support the connection encryption type?

1. Check your connection

network connection outlook does not support the connection encryption type

  1. This error usually occurs if the user computer does not have a stable Internet connection. The first thing you should do here is to check whether you have a working Internet connection.
  2. Try to open any web page and check if the Internet connection is fast enough to work with Outlook client.

2. Check your Outlook Email Client Settings for SSL

  1. Launch Outlook and click on File.
  2. From the right pane click on Account Settings and select Account Settings from the drop-down menu.Outlook Encryption error outlook does not support the connection encryption type
  3. Next click on Change Account Settings.
    Change Account Settings - disable Encryption outlook does not support the connection encryption type
  4. Click on More Settings.
    More Settings Outlook outlook does not support the connection encryption type
  5. Open the Advanced tab.
  6. Here uncheck “This server required an encrypted connection (SSL)” option.
  7. On New version of Outlook, click the Security tab after clicking on More Settings.
  8. Uncheck “Encrypt data between Microsoft Outlook and Microsoft Exchange”.
  9. Click Apply and OK to save the changes.
  10. Click on Next to change the profile settings.
  11. Close the Account Settings window and check if you are able to resolve the error.

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3. Uninstall feature update

  1. Click on Start and select Settings.
  2. Click on Update and Security.
  3. Click on Windows Update. 
  4. Click on View update history.
  5. Under View Update History, click on Uninstall Updates.
    Uninstall Features Updates outlook does not support the connection encryption type
  6. Now go through the installed updates and select the most recently installed KB update. Select the update click on Uninstall.
    Uninstall Features Update outlook does not support the connection encryption type
  7. After the updates are uninstalled, reboot the system and check for any improvements.

4. Turn Off Firewall

  1. Click on Start and select Settings.
  2. Go to Update and Security.
  3. Click on Windows Security.
  4. Click on Firewall and Network Protection.
  5. Click on current active network and turn off Windows Defender Firewall.
    Disable Windows Firewall outlook does not support the connection encryption type
  6. If you have antivirus software running, check if the antivirus program has its own firewall.
  7. Also, disable your antivirus software for an hour, and check if that helps.

5. Repair Outlook

  1. Press Windows Key + R to open Run.
  2. Type control and press OK.
  3. Now go to Programs > Programs and Features. 
  4. Select Microsoft Office and click on Change button.
  5. In the Repair Window, you will two options. Quick Repair and Online Repair. 
  6. First, select Quick Repair as it does not require Internet connection and the repair process is quick. After that, check if the Outlook client is working fine.
    Quick and Online Repair Outlooks outlook does not support the connection encryption type
  7. If that does not work, click on Online Repair and click the Repair button. Wait for the repair process to complete.

There you go, several quick solutions that might help you fix Outlook does not support the connection encryption type, so be sure to try them all.

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