This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

OWA exchange will not open in firefox....is there a simple solution?

  • 3 replies
  • 1 has this problem
  • 1 view
  • Last reply by cor-el

ParaPup
ParaPup
more options

When attempting to open OWA exchange, I get the following:

Your connection is not secure The website tried to negotiate an inadequate level of security. exchange.(insert my company here).com uses security technology that is outdated and vulnerable to attack. An attacker could easily reveal information which you thought to be safe. The website administrator will need to fix the server first before you can visit the site. Error code: NS_ERROR_NET_INADEQUATE_SECURITY

I have googled the problem and there are some very complex answers out there. I am a basic computer person, and most of what they say is way over my head. Is there a simple way to fix this so that I can access my email through firefox instead of having to use IE or Edge?

Firefox 53.0.3 (32 bit) Windows 10 Pro 64 bit

When attempting to open OWA exchange, I get the following: Your connection is not secure The website tried to negotiate an inadequate level of security. exchange.(insert my company here).com uses security technology that is outdated and vulnerable to attack. An attacker could easily reveal information which you thought to be safe. The website administrator will need to fix the server first before you can visit the site. Error code: NS_ERROR_NET_INADEQUATE_SECURITY I have googled the problem and there are some very complex answers out there. I am a basic computer person, and most of what they say is way over my head. Is there a simple way to fix this so that I can access my email through firefox instead of having to use IE or Edge? Firefox 53.0.3 (32 bit) Windows 10 Pro 64 bit

All Replies (3)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You can check the server via this website:

If you need to test your browser:

ParaPup
ParaPup Question owner
more options

Checking the server gives me a whole bunch of information. Is there something specific that I am looking for? Again, I am a simple user and not a computer whiz so I apologize.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

The server may try to use a cipher suit that is black listed in Firefox.

Try to set this pref to false on the about:config page.

  • security.ssl3.ecdhe_rsa_aes_128_gcm_sha256 = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.