Hi solomοn
I haven't set up any universal share, so I cannot help you with that.
My recommendation is to check for name resolution on the master, using the media server sort name first. If that fails check name resolution for additional domain names in Windows IP configuration (the field called "append these DNS suffixes)"
What might happen if you make the short name, full name is addition of domain name to the host name - e.g. srv1.acme.com now becomes srv1.acme.com.acme.com.
Also, if you already got a MSDP running on the media server, be careful of what you are doing.