Outlook 2013 client, not in domain, can't connect to the Exchange 2010 server

Question

Good Aftermoon,
Having issues it seems getting to the right forum but here is what I have. Currently we are running an Exchange 2010 server. OWA is configured and I am not having any issues with people connecting through it. The issue I am having is that any user that tries
to connect through Outlook 2013 gets an error message about the proxy server and then a certificate error. I have run the tests through the toolbox and get the following results. 
Attempting to test potential Autodiscover URL https://autodiscover.westmoreland-county.org:443/Autodiscover/Autodiscover.xml
Testing of this potential Autodiscover URL failed.
Additional Details
Elapsed Time: 694 ms.
Test Steps
Attempting to resolve the host name autodiscover.westmoreland-county.org in DNS.
The host name resolved successfully.
Additional Details
IP addresses returned: 69.89.25.150
Elapsed Time: 284 ms.
Testing TCP port 443 on host autodiscover.westmoreland-county.org to ensure it's listening and open.
The port was opened successfully.
Additional Details
Elapsed Time: 164 ms.
Testing the SSL certificate to make sure it's valid.
The SSL certificate failed one or more certificate validation checks.
Additional Details
Elapsed Time: 245 ms.
Test Steps
The Microsoft Connectivity Analyzer is attempting to obtain the SSL certificate from remote server autodiscover.westmoreland-county.org on port 443.
The Microsoft Connectivity Analyzer successfully obtained the remote SSL certificate.
Additional Details
Remote Certificate Subject: CN=*.bluehost.com, OU=PositiveSSL Wildcard, OU=Domain Control Validated, Issuer: CN=PositiveSSL CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB.
Elapsed Time: 201 ms.
Validating the certificate name.
Certificate name validation failed.
 <label for="testSelectWizard_ctl12_ctl06_ctl00_ctl00_ctl01_ctl02_ctl01_tmmArrow">Tell
me more about this issue and how to resolve it</label>
Additional Details
Host name autodiscover.westmoreland-county.org doesn't match any name found on the server certificate CN=*.bluehost.com, OU=PositiveSSL Wildcard, OU=Domain Control Validated.
Elapsed Time: 1 ms.
Attempting to contact the Autodiscover service using the HTTP redirect method.
The attempt to contact Autodiscover using the HTTP Redirect method failed.
Additional Details
Elapsed Time: 234 ms.
Test Steps
Attempting to resolve the host name autodiscover.westmoreland-county.org in DNS.
The host name resolved successfully.
Additional Details
IP addresses returned: 69.89.25.150
Elapsed Time: 14 ms.
Testing TCP port 80 on host autodiscover.westmoreland-county.org to ensure it's listening and open.
The port was opened successfully.
Additional Details
Elapsed Time: 83 ms.
The Microsoft Connectivity Analyzer is checking the host autodiscover.westmoreland-county.org for an HTTP redirect to the Autodiscover service.
The Microsoft Connectivity Analyzer failed to get an HTTP redirect response for Autodiscover.
Additional Details
The URL specified in the location HTTP header was not HTTPS. URL: http://autodiscover.bluehost.com/Autodiscover/Autodiscover.xml
HTTP Response Headers:
Keep-Alive: timeout=10, max=500
Connection: Keep-Alive
Content-Length: 356
Content-Type: text/html; charset=iso-8859-1
Date: Wed, 03 Dec 2014 18:10:08 GMT
Location: http://autodiscover.bluehost.com/Autodiscover/Autodiscover.xml
Server: Apache
Elapsed Time: 135 ms.
Our setup currently our domain is being hosted and the web master has control of domain settings. 
I am fairly new to the Excchange Server world so any suggestions that you may have as to how I can resolve this would be great. 
Bill

Answer 1

Hi Bill
Thank you for your pos.
You can use the following command to check whether you have purchased the certificate of audiscovery.westmoreload-country.org in your organization:
Get-ExchangeCertificate –server CASServerName | fl
For example: you want to return all certificates stored on the Client Access server named ClientAccess01, you will type the follow command in EMS.
Get-ExchangeCertificate -Server ClientAccess01 | fl
If you didn’t purchased the certificate of audiscovery.westmoreload-country.org, you could contact your certificate supplier.
You could refer to the following link:
https://support.microsoft.com/kb/940726?wa=wsignin1.0
If there are any questions regarding this issue, please be free to let me know.
Best regard,
Jim