exchange server 2010 cerfificates

trying to get activesync and cell phone email working properly.  When I test with exchange 2010
remote connectivity analyzer it shows certificate name failed Exchange-Server.  How do I get a CA certificate to work on the exchange? so my phones can get synced and email. see below for output from test.
 Exchange ActiveSync test Failed
   Test Steps
   Attempting to resolve the host name  mail.myserver.com  in DNS.
  Host successfully resolved
   Additional Details
  IP(s) returned: 11.22.333.444
 
 Testing TCP Port 443 on host mail.myserver.com to ensure it is listening and open.
  The port was opened successfully.
 Testing SSL Certificate for validity.
  The SSL Certificate failed one or more certificate validation checks.
   Test Steps
   Validating certificate name
  Certificate name validation failed
   Tell me more about this issue and how to resolve it
   Additional Details
  Host name  mail.myserver.com  does not match any name found on the server certificate CN=Exchange-Server

[Edited by SouthMod]
ajc2cAsked:
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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
This is because your cert has a namespace of Exchange-Server and not  mail.myserver.com    You need to create a selfsigned cert with this namespace then install it on a windows mobile phone.    
Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
But to save yourself a headache I would purchase a UC cert.
ajc2cAuthor Commented:
where do i get the UC certs? can you give me full details on that and how much do they cost??
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ajc2cAuthor Commented:
If I purchase a UC cert do I need to still install on cell phone? or do i just need to install a cert on the cell  if I make the cert  myself
Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
If you purchase a UC Cert this is no need install the cert on the phones.     You can get from:
http://www.digicert.com/unified-communications-ssl-tls.htm
http://www.godaddy.com/ssl/ssl-certificates.aspx?ci=9039  (multiple domains)  
http://www.exchangecertificates.com/
If you use a self-signed cert you need to change the namespace so it matches   mail.myserver.com  then export it and install on your phone.

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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
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