On SharePoint 2010, users cannot access intranet and internet sites using domain friendly names

Users could access sharepoint intranet site and internet site using the domain friendly names.  Now they can access intranet site and internet site using IP addresses only.  Further, when they access the site, it not possible for them to make edits to calendar or change content, upload documents, etc.  As sys admin I make the changes on their behalf directly on the SharePoint WFE.  I was advised to take a look at AAM on Central Admin.  2 screenshots attached.  One shows what the user sees when they attempt to make changes, e.g. to calendar.  The second screenshot shows current AAM settings on server.  Please advice how to resolve this issue.  Thank you in advance.  (FYI - I cannot pinpoint what may have caused this issue to being with).
current-AAM-mapping.png
What-the-user-sees-when-trying-to-make-c
Francis MichaelIT ManagerAsked:
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MontoyaProcess Improvement MgrCommented:
I would check on:

Central Admin app pool (looks like you've done this)
IIS settings
DNS servers

those are the places I would check first
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Joshua GrantomSenior Systems AdministratorCommented:
In regards to DNS, I would make sure there are static A records for

sharepoint           192.168.1.13

under yourdomain.org
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Francis MichaelIT ManagerAuthor Commented:
Iammontoya / Joshua G,
Steps taken:
1. Checked IIS settings (Bindings / SSL)
2. Added static A record for sharepoint 192.168.1.13 to yourdomain.org (as suggested)
Result:
1. Intranet access is working.  Users can access the link http://sharepoint2010/default.aspx.  Also, users can add content to web page.
2. Internet access issue remains unresolved.  Users can only access it via the public IP address.
If you have any ideas or suggestions, please let me know.  Thank you in advance.
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Joshua GrantomSenior Systems AdministratorCommented:
For the internet access, I would check all DNS Servers to make sure that they have valid public DNS servers in the DNS list under Network Connections > (Local Area Network) > Internet Protocol Version 4 Properties > Advanced > DNS Tab

These can be your ISP DNS servers or you can use public DNS like Google

8.8.8.8
8.8.4.4
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Francis MichaelIT ManagerAuthor Commented:
Joshua,
I went to www.mxtoolbox.com to check "A" records.  Check for mydomain.org and it resolved correctly.  Checked for sharepoint.mydomain.org and it did not resolve correctly.  The Public IP is not what it should be.  Could this be the cause?  See screenshots.
DNS-lookup-for-domain-result.png
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Francis MichaelIT ManagerAuthor Commented:
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Joshua GrantomSenior Systems AdministratorCommented:
Yes, that would be the issue for users that are trying to access sharepont from outside the network. It needs to be the public IP address that is forwarded to 192.168.1.13 internally
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Joshua GrantomSenior Systems AdministratorCommented:
I apologize, the reason why I was recommending DNS servers is because I misunderstood the question. I thought your internal users were having trouble accessing the internet in general. It wasn't clear that you were referring to external users trying to access your sharepoint. I know understand.

Once the DNS changes propagate they should be able to access the sharepoint site externally just fine. Propagation can take 24 to 48 hours
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Francis MichaelIT ManagerAuthor Commented:
Pointer records were added to SharePoint's public url and it is up and running.  Thank you for pointing me in the right direction.
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Joshua GrantomSenior Systems AdministratorCommented:
Glad I could help!
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