We set local.abc.com domain.
Exchange is authoritative for local.abc.com and abc.com and all people use abc.com as main address.
We have simple SSL certificate for abc.com installed.
Proper SRV record is set at Network Solution.
No problem with Outlook connection from outside.
There is certificate warning showing by Outlook inside office.
Problem is solved installing second router with different external IP address for Exchange server.
So Cisco ASA firewall does not allow session to go outside and return back.
Another workaround is editing host file on every PC specifying mail.abc.com ---> internal IP.
It is not option for laptops as they go outside.
Is any other fix except Split DNS configuring?
Can I set a record mail.abc.com ---> internal IP in host file of DC or it does not check a host file?