On my FC14 desktop I try to mount

sudo mount -t cifs //mydomain.local/DATA/Users/James /home/James/WinHomedir/ -o user=James,iocharset=utf8,file_mode=0777,dir_mode=0777
This will generate :
mount error: could not resolve address for mydomain.local: Unknown error

Nevertheless
dig mydomain.local
returns the 2 (!) IP addresses of the Windows domain controllers that host this DNS domain, as well as the name spaces.

In addition, when I replace "mydomain.local" with one of the returned IP addresses, the mount works without fail.

For info:
/etc/request-key.conf

create user debug:* negate /bin/keyctl negate %k 30 %S
create user debug:loop:* * |/bin/cat
create user debug:* * /usr/share/keyutils/request-key-debug.sh %k %d %c %S
negate * * * /bin/keyctl negate %k 30 %S
create cifs.spnego * * /usr/sbin/cifs.upcall -c %k
create dns_resolver * * /usr/sbin/cifs.upcall -c %k

The last two lines were added, based on a suggestion in a forum, and this may or may not have led to the entry in
/etc/resolv.conf:

# Generated by NetworkManager
domain mydomain.local
search mydomain.local
nameserver 10.104.1.253
nameserver 10.104.1.254

The question is:
What needs to be done in order to have Fedora recognize the //mydomain.local/DATA Windows name space ?
I want to keep redundancy and therefore, I am hosting my DNS and namespaces on at least 2 servers.

easy way
try adding it on /etc/hosts from your remote server the ip address of local server of the remote server
and then remount again. see if it that works