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Outlook 2016 Security Alert certificate error - Security Cert for this site has been revoked.

I am running Windows 10 Home, with Outlook 2016 using Exchange online plan. When I test Email AutoConfiguration, I see the following in the log: Autodiscover to https://autodiscover.domain.com/autodiscover/auotdiscover.xml Failed (0x80070057)
Local autodiscover for domain.com Failed (0x8004010F)
I can see the certificate has expired, but confused why it would look for an Equifax Cert when I'm using Exchange online plan?
Is it possible to stop Outlook or Windows to stop looking for this certificate?

Thanks in advance.

SOLUTION

Ivan

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SOLUTION

Akhater

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lbideaux

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Ivan,
I used the following website and it shows the expired cert for the domain. https://www.sslshopper.com/ssl-checker.html
I didn't setup the domain, but might be able to get access to their hosting.
There are only a handful of PC's so if I could find a fix for the PC/Outlook I could apply to the few PC's.

Thanks.

Akhater

Add in the hostsfile of the computer domain.com pointing to 127.0.0.1 it would render https://domain.com inaccessible and would solve your issue

lbideaux

ASKER

In Office 365 I ran the Check DNS, and returned "All DNS records are correct no errors found.

lbideaux

ASKER

Akhater,
Ok, could this cause any issues browsing to the website?

Thanks for your input.

Akhater

Off course they won't be able to reach domain.com anymore but they will be able to reach www.domain.com

Akhater

And it's not an error with the dns configuration but an expired certificate in your website so it is normal that office 365 will detect no errors

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lbideaux

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Akhater

Thanks for sharing your solution

Akhater

Question answered, OP solved it on the client side