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Exchange 2016 OWA your connection is not secure

Exchange OWA and ECP are showing that your connection is not secure. The administrators can’t sign in to ECP, and users can’t sign in to OWA. It’s happening in all browsers; Internet Explorer, Firefox, and Google Chrome. How to fix Exchange 2016 OWA your connection is not secure?

What is happening

The following message appears in the Firefox browser. It will show a different error in other browsers.

Exchange 2016 OWA your connection is not secure browser

In Google Chrome, the message is showing:

ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY

Solution for Exchange OWA your connection is not secure

Download IIS Crypto GUI by Nartac Software. After the application is downloaded, start the application. Click Best Practices.

Exchange 2016 OWA your connection is not secure IIS Crypto main

A message shows that the best practices are set for the system. In our case, the Exchange Server 2016. Click OK.

Exchange 2016 OWA your connection is not secure best practices

Click Apply to save the changes.

Exchange 2016 OWA your connection is not secure configured

A reboot is required for the settings to take effect. Click OK.

Exchange 2016 OWA your connection is not secure reboot required

Restart the Exchange Server 2016.

Test Exchange OWA secure connection

After the restart of the system, start your favorite browser. Type the URL for OWA or ECP.

After entering the URL, we can see the screen we are used to. Users can now sign in with their credentials. Exchange 2016 OWA your connection is not secure is fixed. It’s not only fixed for one browser but for all browsers.

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Conclusion

You learned why it shows Exchange 2016 OWA your connection is not secure. The solution to this problem is securing SSL and TLS on the Exchange Server. Download IIS Crypto and use the best practices option. Remember to reboot after applying the settings!

Did you enjoy this article? You may also like Configure internal DNS for Exchange. Don’t forget to follow us and share this article.

ALI TAJRAN

ALI TAJRAN

ALI TAJRAN is a passionate IT Architect, IT Consultant, and Microsoft Certified Trainer. He started Information Technology at a very young age, and his goal is to teach and inspire others. Read more »

This Post Has 3 Comments

  1. Hi, THanks for you sharing this article, WIll this also works for Windows 2008 R2 with Exchange 2010 SP3 ?

    KIndly confirm, as we are facing this issue.

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