Shared folder DNS shortname "randomly" stops resolving on Windows Server 2008 R2

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http://serverfault.com – I'm running your standard Domain set up - AD with DNS and a RDS server. On the RDS server, I've mapped some drives to a local NAS using the DNS shortname... \\folders\sharedfolder \\folders is a static DNS entry on the AD server. "Randomly" it starts throwing the error "Windows cannot access \\folders" I can: ping folders nslookup folders (connects to local DNS server and returns the proper IP) connect by ip address \\\sharefolder connect by FQDN \\folders.domain.com\sharedfolder but I cannot use \\folders\sharedfolders again until I restart the RDS server. net view \\f (HowTos)