This is a simple PowerShell script I wrote to assist in locating a 3rd party federated edge server.
The script takes user input to then use DNS to attempt to resolve _sipfederationtls._tcp.somedomain
$Domain = Read-Host "Domain to find SIP Federation SRV record for?
$SRVRecord = Resolve-DnsName -Name ("_sipfederationtls._tcp." + $Domain) -Type SRV
$SRVRecord