skype ( office365 ) 설정을 할때 아래와 같이 SRV 레코드를 DNS에 선언하라고 한다. 
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Name / Priority / Content / TTL _sip._tls.domain.com / 100 / 1 443 sipdir.online.lync.com. / 3600 _sipfederationtls._tcp.domain.com / 100 / 1 5061 sipfed.online.lync.com. / 3600 |
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_sip._tls IN SRV 100 1 443 sipdir.online.lync.com. _sipfederationtls._tcp IN SRV 100 1 5061 sipfed.online.lync.com. |
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C:\>nslookup -q=SRV _sip._tls.domain.com _sip._tls.jehaplus.net SRV service location: priority = 100 weight = 1 port = 443 svr hostname = sipdir.online.lync.com C:\>nslookup -q=SRV _sipfederationtls._tcp.domain.com _sipfederationtls._tcp.jehaplus.net SRV service location: priority = 100 weight = 1 port = 5061 svr hostname = sipfed.online.lync.com |