This FAQ will show you how to add a SRV Record to your domain name.
A SRV record is a DNS entry that specifies information about a service that is available on your domain, most important, being the location of the service inside that domain.
Firstly, you need to ensure your domain is pointed to our nameservers:
If the domain is not pointed to the 123-reg nameservers, you will be unable to manage them from the 123-reg control panel.
For more information on changing your nameservers please view the following article:
How do I change the nameservers for my domain name?
Please note: It will take between 24-48 hours for the new DNS records to become active
Login to your 123-reg Control Panel. Enter your Username and Password and click Login.
Scroll down to the Domain Names section, select the relevant domain name from the drop down box and click the Manage button.
Scroll down to the heading Advanced Domain Settings and click onto Manage DNS.
Click onto the Advanced DNS tab.
For your new record, select the SRV option from the Type drop down list.
Your host name specifies the name of the server providing the service. Your host name can be either: _sipfederationtls_tcp.testing.com. or you can take the domain away to show just _sip.
Please note: When entering the long form host name (for example: _sipfederationtls_tcp.testing.com.) it is important to add the full stop at the end of the Host name.
The priority represents the prominence the record gets given. This can range from 0 to 65535, with 0 being the highest priority.
Your TTL specifies how long the record takes to resolve. This should be measured in seconds, for example, one hour equals 3600 seconds, so your TTL would be 3600.
Your destination is where the traffic is being sent to. This should show the Weight followed by the Port, and then the domain name. The values must be separated with a space and should be displayed like this: 1 5061 testing.com.
When complete, click the Add button. Your SRV record will now be created.
Please note:Some services, such as Microsoft 365, will require multiple SRV records to be created.
In order to verify your domain name with Microsoft Office 365, two SRV records will need to be added:
1. sip SRV record
destination SRV: 1 443 sipdir.online.lync.com.
2. sipfederation SRV record
destination SRV: 1 5061 sipfed.online.lync.com.
Once created, they should look something like this: