Each and every time I start Microsoft Office 2010 I get a Security Alert saying that there is a problem with the security certificate for autodiscover.xxx.xxx.I have followed the Certificate installation wizard to install the certificate on my machine, but even after a restart of the application I am still being prompted.
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I thought I would give Microsoft support a chance with this one, but. Anyway I am getting a 'certificate not valid' on my mobile devices when trying to connect to our Office 365 Exchange. Exchange Online. Whatever one wants to call it! When I run the autodiscover test, I get the following (mydomain.com is a fake, obviously): Host name mydomain.com doesn't match any name found on the server certificate CN=sni.dreamhost.com, O=DreamHost, C=US. We host that domain at Dreamhost.
I am assuming that I need a SSL certificate somewhere, but am a little unsure as to where, exactly. Has anyone ever been through this before? OK, after setting up secure hosting at my host, and purchasing an SSL certificate, I get past that part, and now get this: A Web exception occurred because an HTTP 404 - NotFound response was received from Unknown.
HTTP Response Headers: Keep-Alive: timeout=2, max=100 Connection: Keep-Alive Content-Length: 346Content-Type: text/html; charset=iso-8859-1 Date: Fri, 05 Jun 2015 16:45:57 GMT Server: Apache Elapsed Time: 169 ms. So, I think that is OK. It works on the iPhone now. So, I think that's the issue. My hosting domain needed SSL.
It would be very helpful to see a screenshot or your current DNS settings, but from what we can gather, Office 365 should not be trying to connect directly to DreamHost. Please check the following links for further reference to be sure your domain is set up correctly: However if you prefer not to put too much info publicly here on Spiceworks, perhaps you can reach out to our directly with your settings.
While we don't normally provide specific support for Office 365, perhaps with more detail we can help find the setting throwing it off. I hope that helps a bit! Ellice: Thanks for the response.
I did reach out to DreamHost support. Their answer is below. I read that in these instances, usually MS blames the hosting company, the hosting company blames MS, and the answer is in between, which is why I posted here.:) This is what support said: What is it exactly that you are using Office 365 on your domain (which component)? It sounds like whatever you are using, does not like SNI.
The above certificate is tied to the Apache service you are on. Since IPv4 is becoming scarce, technology is advancing where you do not need a unique IP for secure hosting by using SNI. Since at least one domain on the Apache service is using secure hosting without a unique IP, the SNI certificate became active. Only applications that are outdated, complain about SNI. The only way to fix this would be for you to add secure hosting (if you have not already), buy and add a SSL certificate, and add a unique IP. If there is anything else you need help with, please let me know!
OK, after setting up secure hosting at my host, and purchasing an SSL certificate, I get past that part, and now get this: A Web exception occurred because an HTTP 404 - NotFound response was received from Unknown. HTTP Response Headers: Keep-Alive: timeout=2, max=100 Connection: Keep-Alive Content-Length: 346Content-Type: text/html; charset=iso-8859-1 Date: Fri, 05 Jun 2015 16:45:57 GMT Server: Apache Elapsed Time: 169 ms. So, I think that is OK. It works on the iPhone now. So, I think that's the issue.
My hosting domain needed SSL.
Outlook for Office 365 Outlook 2019 Outlook 2016 Outlook 2013 Outlook uses certificates in cryptographic email messaging to help keep communications secure. You can view your own certificates or those that you receive in email messages. View your certificates. On the File tab, click Options. In the left pane, click Trust Center.
In the right pane click Trust Center Settings. In the left pane, click Email Security. Under Encrypted e-mail, click Settings. Under Certificates and Algorithms, click Choose. Click the certificate that you want, and then click View Certificate. View certificates on received messages. In the email message, click or on the Signed By line.
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Click Details. Click Signer or Encryption Layer, and then click View Details. To see details about the certificate, click View Certificate.
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