What is the extra data specified in a DNS entry called?
Solution 1:
You're referring to location of service records (SRV). They're not Windows DNS specific.
With Powershell, you can retrieve them from your AD Domain easily.
Import-Module DnsServer
Get-DnsServerResourceRecord -RRType SRV -ZoneName $(Get-ADDomain).DNSRoot -ComputerName $(Get-ADDomain).DNSRoot