I am getting mixed results on trying to get Exchange 2013 connected to clients.

I have 1 x Outlook 2007 client connected to Exchange 2013
I have 1 x Outlook 2013 client connected to Exchange 2013

but I have about 25 2007 clients and 1 other 2013 client that will not connect despite checking and rechecking all settings.

Anyone got any suggestions?

No obvious suggestions for the 2013 client, but for the 2007 clients have you checked that they have Service Pack 3 with the Outlook 2007 November 2012 update installed on them as that's required for use with Exchange 2013? See the Supported Clients section of http://technet.microsoft.com/en-us/library/aa996719(v=exchg.150).aspx for details of all compatible clients and the link to the November update.

Thanks for reply.

Yes checked all of those.

I am at a total loss and would appreciate the help of anyone that can help me work through this.
Totally stumped at the moment.

Hi,

Please have a test to log on a problematic users profile on a good machine. Does it work?

Thanks,

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I appear to have resolved it.
I created a self signed cert and ensured that the server name being requested was inside the cert.  

Then I logged on as the user and i imported the certificate in the trusted CA
BUT and its a BIG BUT
when I checked the CA area I could not see it.
After much research I found that when I was logged on as a roaming user that the certificate did not go into the CA.
I had to log on as a domain admin and then import the certificate by going running MMC adding the certificate snap in and then importing the certificate.  
It then showed up and I was able to log back in as the user and complete the outlook setup making sure to utilise the RPC over HTTP in security and using NTLM.

Looking back, I also found a MS article http://support.microsoft.com/kb/2264398#appliesto
that refers to a similar missing registry key causing a similar problem to that lots of others have reported but this looks to be relevant only to LOCAL profiles and not roaming profiles and when I navigated to the key it showed 'Roaming'.

Hope this helps someone.  
I am on a mission to help others now as this has sucked so much of my time.

• Marked as answer by MrNewbie 3 hours 51 minutes ago