How do I resolve a Security Alert - outlook.office365.com

Question

_{Tuesday, October 27, 2015 4:36 AM | 1 vote}

When my Win8.1 machine starts up recently I am getting the following error.

When I click on View Certificate it looks like this:

There is an entry in the event viewer (System) that says the following:

The certificate received from the remote server was issued by an untrusted certificate authority. Because of this, none of the data contained in the certificate can be validated. The SSL connection request has failed. The attached data contains the server certificate.

Anyone know if this can be trusted?  I do have an internet connection and I can connect from Office365 in Outlook on my PC.  Is there anything I need to do?

Thank you,
Sheila

Sheila Jefferson-Ross Dynamics GP Consultant Accounting & Association Software Group

All replies (4)

_{Tuesday, October 27, 2015 5:15 AM ✅Answered | 2 votes}

To be honest i don't think that is correct you may have a bug on your machine redirecting you to the incorrect address.

this is the certificate i get when i log into office 365



but to install a certificate open internet explorer in admin mode (right lick the icon and click open as admin)

go to the website in question https://outlook.office365.com

click on the padlock in the address bar and click on view certificates

then click on install certificate. change the location to local machine and click next

select place all certificates in the following store. and click browse

select trusted root certification authorities and click ok

then click next and finish 

you have just installed a certificate into the local machine.

_{Friday, September 16, 2016 3:01 AM}

This is an old question, but it's one of the top google hits for this topic.

This is most often caused because you are connected to a network with a captive portal.  If you have just connected to a free Wi-Fi network, such as a coffee shop, the network may be trying to redirect you to a page where you can accept terms and conditions to access the Internet.

If you try to get to a web site with a browser, you will get redirected to the captive portal page and you will see the instructions to click the button to continue.

But if Outlook can't interpret the redirect properly when it tries to connect.  When it gets redirected, it sees the certificate of the captive portal when it was expecting to see a valid certificate for office365.com.  It sees this as a possible network attack and warns you with the dialog.

Just click "No" and then open a browser and accept the terms on the captive portal page.  Outlook will try to connect again and will succeed.

_{Tuesday, April 4, 2017 6:02 AM}

It just means what it says, office 365 is not to be trusted, just wait a few days until they release office 366

_{Tuesday, April 4, 2017 4:07 PM}

Very funny.

Sheila Jefferson-Ross Dynamics GP Consultant Accounting & Association Software Group