If you use CloudFlare for DNS and you need to create a SRV record using the TLS protocol you will find that their interface does not support it. The GUI only shows _TCP and _UDP in the protocol drop down. Fortunately there is an easy way around this problem.
You can easily import a Zone file into CloudFlare and that will accept _TLS.
If you are working with Office 365’s DNS setup you can simply export the DNS Zone that they want you to add:
Alternately, you can just create your own zone file using a text editor (like Notepad++ or Notepad). Copy and paste the following entry below into your text editor and adjust the domain. This is the entry we needed for our new domain ElectricCadi.com :
_sip._tls.electriccadi.com. 3600 IN SRV 100 1 443 sipdir.online.lync.com.
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