Exchange 2010 - The name on the security certificate is invalid...

So there is a lot of information about this and I did some research before posting because I was getting confused, so decided to post my own question to get some specific help.  

So, we had an Exchange 2003 server, upgraded to 2010.  We host internally and have OWA setup.  Purchased a certificate from godaddy for the domain and installed, everything is working fine for the OWA.  

Most machines have Outlook 2010, at first when Outlook was opened I users were receiving 2 of the Security Alerts (the name on the security certificate is invalid...).  So I did some research and should I should run the following commands in EMS:

Set-ClientAccessServer -Identity CAS1 -AutodiscoverServiceInternalUri https://webmail.mycompany.com/autodiscover/autodiscover.xml
 
Set-WebServicesVirtualDirectory -Identity “CAS1\EWS (Default Web Site)” -InternalUrl https://webmail.mycompany.com/ews/exchange.asmx 

Set-OABVirtualDirectory -Identity “CAS1\oab (Default Web Site)” -InternalUrl https://webmail.mycompany.com/oab
 
Set-UMVirtualDirectory -Identity “CAS1\unifiedmessaging (Default Web Site)” -InternalUrl https://webmail.mycompany.com/unifiedmessaging/service.asmx

I ran the first 3 without issue, fourth one would not run, after research, seems like that is only for Exchange 2007.  Ok, so now I only receive 1 of the Security Alerts when I open Outlook.  

Here is also more information that is needed.  When the Security alert pops up when Outlook is opened, the domain at the top is:  exchange_server_name.domain.com

When I click on view certificate the issued to piece shows:  webmail.domain.com

So I am pretty sure that is where the problem is?  Just not sure the exact steps to fix this?  As always all help is appreciated...
teamorangeAsked:
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GovvyCommented:
You'll need a new cert with each subdomain configured as a SAN
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GovvyCommented:
I believe you will need subject alternate names (SAN) on the certificate
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teamorangeAuthor Commented:
Is that something that is done through Godaddy where I purchased the certificate?  Do I need to purchase another one?

Are they any other options?
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jabri007Commented:
Hello,

How did you requested the certificate initially because you can do it from Exchange 2010 server itself

Refer: http://technet.microsoft.com/en-us/library/dd351057.aspx

ideally in a certificate you need the following DNS Names

1. OWA Common Name with External domain name
2. Autodiscover.<external domain name>
4, CAS Array name (optional)
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