Outlook SSL Certificate Error

Hi All,

When our Outlook 2010 users log in they are greeted with a certificate error.

Outlook Certificate Error
Any idea how I can get rid of it.  I'm comfortable deploying certificates via group policy (if that helps)


Many thanks
D
LVL 2
detox1978Asked:
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Benjamin Van DitmarsSr Network EngineerCommented:
make in youre internal dns an srv record _autodiscover _tcp port 443 and enter te name the autodiscover url in youre certificate. also be sure you make dns entrees of youre external owa and autodiscover point to the local ip of youre exchange server.
detox1978Author Commented:
do you have a link to a guide (ideally with screenshots or video)?
Benjamin Van DitmarsSr Network EngineerCommented:
had to figure this out a couple of months ago. i will look in the morning for documentation
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Peter HutchisonSenior Network Systems SpecialistCommented:
You need to create a SSL certificate with the name of your main mail service AND as an alternative subject name add autodiscover.domain.com to the certificate. If you use the Exchange EMC to generate the certificate request, it will auto-add the required names to the list.

http://www.msexchangegeek.com/exchange-2010-emc-and-certificates-management-part-1/

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Benjamin Van DitmarsSr Network EngineerCommented:
it's not alloud anymore to put youre localserver.localdomain in youre cert. youre client inside the domain looks for autodiscover.localdomain. the server respond with a cert. that has outsidename.domain. and they dont match. with the result this message you get
MASEE Solution Guide - Technical Dept HeadCommented:
Here is an article  but you need a 3rd party certificate.
http://www.experts-exchange.com/articles/13676/Out-Of-office-not-working.html

As commented above you cannot add your internal FQDN in 3rd party certificates.
Peter HutchisonSenior Network Systems SpecialistCommented:
You can add internal FQDNs but as long as they do not end with .local.
e.g. servername.mycompany.com
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