Cannot Connect To Outlook In Firefox

[OneTrueFriend]

Message Reads
go.microsoft.com uses an invalid security certificate.
An additional root certificate may need to be imported.
How can I get to my inbox?
Problem does not happen in Edge.
Thanks.

[RobertJ]

.
URL you are trying to connect to https:.....................com

.

[OneTrueFriend]

Thanks Robert, but I am afraid that that made no sense at all in that I am none the wiser.
Could you give more detailed instructions please>
Thanks.

[DanRaisch]

What is the exact URL that you are trying to connect to when you get that error message? It should start with https:// but what comes after that?

[OneTrueFriend]

outlook.live.com/owa/?authRedirect=true.
Thanks for reply.
Hope this helps.

[DanRaisch]

See what happens if you try http://login.live.com/login.srf

[OneTrueFriend]

Same.
Your connection is not secure.
Only happens in Firefox.

[RobertJ]

See what happens if you try http://login.live.com/login.srf

I tried that using FF59.0.2 and had no problem with a non-secure message. I of course could not log in since I don't have an Outlook account.

EDIT: I tried to log in. It didn't say anything about non-secure; it only said I used the wrong PW.

.

[Frank Lion]

I've come across this one before. Run this - https://www.malwarebytes.com/adwcleaner/ as I suspect a SSL change has been made on your PC by malware.

The scan only takes 5 minutes.

[OneTrueFriend]

Thank you.

Unfortunately, clicking on the link produced the same error message.
I ran a scan from my desktop Malwarebytes and it came up clean -as usual.
It does appear to be a Firefox thing, although some suggest that it might be related to the antivirus prog.
I am going to uninstall my 360 antivirus next and try Avast free, which includes Network checking.

[elist74]

try this (in firefox window) Ctrl H , search (search history) for the trouble site, right click and chose "Forget about this site" This will reset the site , removing login, password, cookies etc... (you will have to re-enter the password.

[OneTrueFriend]

Thank you.
Afraid that that didn't work.
The site seems to open alright but shows a message saying that it uses cookies.
That screen remains unless Learn More is clicked.
It is then that the Insecure Connection message shows.

[Brummelchen]

try a clean profile

create a new profile
http://kb.mozillazine.org/Creating_a_ne ... on_Windows
or
http://kb.mozillazine.org/Profile_Manager


if that wont help uninstall your antivirus (if not Windows defender)
https://support.mozilla.org/en-US/kb/tr ... OWN_ISSUER
https://support.mozilla.org/de/questions/1206816

[LIMPET235]

Hi OTF,
I take it that you're running Norton 360.

I am going to uninstall my 360 antivirus...

If you're going to un-install it, you will need to use their "un-Install tool."
> https://support.norton.com/sp/en/us/hom ... &version=1

Plus,
if you cannot get to this site to D/L the AdwCleaner, > https://www.malwarebytes.com/adwcleaner/
then something is definitely "fishy" in/on your computer.

[OneTrueFriend]

I run 360 Total Security Antivirus.
Clicking on the link to Malwarebytes ADW Cleaner - above - produced the same Insecure message.
I am able to run Malwarebytes from desktop and it shows, like all the other checks, that everything is fine.