SRV records (or service records) “tell” your domain name the exact location of the web server for any specified service. It is defined in RFC 2782 and has a 33 type code.
To set your SRV records in Microsoft Office 365, you need to log in to cPanel and click on the Advanced DNS zone editor icon which is in the Domains section.
in the Add a Record area, in the boxes for the new record, type or copy and paste the values from the following table.
(Select the Type value from the drop-down list.)
| Name | TTL | Type | Priority | Weight | Port | Target |
| _sip._tls.domain_name. (for example, _sip._tls.freshcoffee.com.)
This value MUST end with a period (.) |
3600 | SRV | 100 | 1 | 443 | sipdir.online.lync.com. |
| _sipfederationtls._tcp.domain_name. (for example, _sipfederationtls._tcp.freshcoffee.com.)
This value MUST end with a period (.) |
3600 | SRV | 100 | 1 | 5061 | sipfed.online.lync.com. |
