Exchange 2010 - Outlook clients receiving an error stating "The name on the security certificate is invalid or does not match the name of the site"

I have an in house Exchange Server (Internal name DC01 - local IP FQDN
Remote users access the Server via Http and have no issues connecting and do not receive the certificate error. They have the following settings.
username  the user's ID
Proxy settings
basic auth

Internal users receive the error message with the following settings
server dc01.mydomain.local
username  user's ID
no proxy settings.

Internal DNS A record points to the IP address of the Exchange server
Does anyone know how to resolve this issue with OL.

Thanks in advance
Ollie BrancheAsked:
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MASEE Solution Guide - Technical Dept HeadCommented:
Please follow my article to resolve this issue.
If not resolved please let me know
Ollie BrancheAuthor Commented:
Sorry for the long delay.
I followed the steps in the article and the issue still remains
MASEE Solution Guide - Technical Dept HeadCommented:
Can you post the error here?

Do you have and in your certificate?
Can you see your common name(i.e. in the results of the below command?
Get-clientAccessServer | fl Name,AutoDiscoverServiceInternalUri
Get-OabVirtualDirectory |  fl Server,Name,internalurl,externalurl
Get-WebServicesVirtualDirectory | fl name,internalurl,externalurl

Open in new window

Do you have below A records created which points to Exchange2010 server internal IP?

If all these done you shoud not get certificate error
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Ollie BrancheAuthor Commented:
No error messages. Outlook just pops a message stating The name on the security certificate is invalid or does not match the name of the site.
MASEE Solution Guide - Technical Dept HeadCommented:
Did you follow my article?

Did you try what I suggested in my last post?

After doing that please run the belwo commands in your Exchange powerShell and post the results. All these explained in my article in my first post.
1. Get-clientAccessServer | fl Name,AutoDiscoverServiceInternalUri
2. Get-OabVirtualDirectory |  fl Server,Name,internalurl,externalurl
3. Get-WebServicesVirtualDirectory | fl name,internalurl,externalurl

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MASEE Solution Guide - Technical Dept HeadCommented:
You should select my first port as answer as all these explained in detail in my article which will help others in future
Thissitesucks tohellwithEECommented:
Hi MAS, I have the same issue, and get internal and external URLs for 2/3 of the powershell commands, the last one (Get-webservices) shows no external URL. I am getting errors for and Please advise.
Thissitesucks tohellwithEECommented:
Also, autodiscover has a host (a) that's using for it's FQDN. Is that correct? My error is twice-fold, is showing a "name does not match" as well as showing the same error. Thanks in advance!
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