NS
Nameservers
TXT
TXT Records
_sipfederationtls._tcp.5061.1.100.3600.@.sipfed.online.lync.com
v=spf1 mx a ip4:66.96.128.0/18 include:spf.protection.outlook.com include:spf.hornetsecurity.com include:u3366496.wl247.sendgrid.net -all
_sip _tls 100 1 443 sipdir.online.lync.com