domain name system - new DNS zone with Forward to external DNS

I have read DNS and Forward Lookup Zones but I did not fing the aswer there.

I have Microsoft Domain with Active directory server , and DNS server for internal use.
My local domain called example.local and it is managed by this server.
I need to be able to add locally example.com (Which managed by external public DNS server like GoDaddy), But I need the local DNS server to forward the lookup in case of unexist record.

For example: on the public DNS server i have www.example.com -> 1.2.3.4

on the local DNS I have mail.example.com -> 2.3.4.5

Now, I need to be able to lookup both www and mail.example.com from Internal (It is OK of course to lookup only www from external), But I do not want to overwrite it, I want to put only mail.example.com on the local and that the DNS server will forward it to the ISP DNS.

Is it possible?

Thanks.