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.

Firefox preventing Outlook from loading

  • 5 replies
  • 5 have this problem
  • 12 views
  • Last reply by Happy112

AmandaJR
AmandaJR
more options

As of today I cannot open Outlook through Firefox.

Message:

n error occurred during a connection to outlook.live.com. Invalid OCSP signing certificate in OCSP response. Error code: SEC_ERROR_OCSP_INVALID_SIGNING_CERT 

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the web site owners to inform them of this problem.
As of today I cannot open Outlook through Firefox. Message: n error occurred during a connection to outlook.live.com. Invalid OCSP signing certificate in OCSP response. Error code: SEC_ERROR_OCSP_INVALID_SIGNING_CERT The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the web site owners to inform them of this problem.

Chosen solution

Hi

Unfortunately Microsoft has misconfigured a security feature (OCSP stapling) on their servers which got now cached in your local firefox installation.

In order to resolve that, please enter about:config into the Firefox address bar (confirm the info message in case it shows up) and search for the preference named security.ssl.enable_ocsp_stapling. Double-click it and change its value to false - this will degrade a security feature in Firefox, so please revisit it in a couple of days again after Microsoft has fixed their stuff and turn it back on again then.

Read this answer in context 👍 2

All Replies (5)

Paul
Paul
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

Hi

Unfortunately Microsoft has misconfigured a security feature (OCSP stapling) on their servers which got now cached in your local firefox installation.

In order to resolve that, please enter about:config into the Firefox address bar (confirm the info message in case it shows up) and search for the preference named security.ssl.enable_ocsp_stapling. Double-click it and change its value to false - this will degrade a security feature in Firefox, so please revisit it in a couple of days again after Microsoft has fixed their stuff and turn it back on again then.

AmandaJR
AmandaJR Question owner
more options

Thanks Seburo that has worked and will change back in a couple of days as advised.

Happy112
Happy112
more options

AmandaJR said

Thanks Seburo that has worked and will change back in a couple of days as advised.

As Seburo's post has solved your problem : Would you be a dear and mark his answer as   'Chosen Solution'  ? Thank you in advance   !

AmandaJR
AmandaJR Question owner
more options

Happy112 said

AmandaJR said
Thanks Seburo that has worked and will change back in a couple of days as advised.

As Seburo's post has solved your problem : Would you be a dear and mark his answer as   'Chosen Solution'  ? Thank you in advance   !

I think it is already marked?

Happy112
Happy112
more options

AmandaJR said

I think it is already marked?

Apologies :   while I was posting my request   (you had marked it   'Helpful'   at the time),   you marked Seburo's answer   'Chosen Solution'  .......   (sorry   .... )