Some services such as Office365 require SRV records added to the target domain's DNS records.

Domain 1800-europe.com is being used for this example.

Such service will provide you all related DNS records needed to be added. In this case will be SRV records.

For Office365, you will need to create 2 SRV records.

• Hostname/Name: _sip._tls
• Type: SRV
• Value/Content: 1 443 sipdir.online.lync.com
• Priority: 100
• TTL: 3600 (or provider default)

• Hostname/Name: _sipfederationtls._tcp
• Type: SRV
• Value/Content: 1 5061 sipfed.online.lync.com
• Priority: 100
• TTL: 3600 (or provider default)

Navigate to the target zone's records and proceed add the required records.

For _sip._tls hostname,

NOTES:

TTL 300 is being set here is just to fasten up the DNS propagation to the nearby resolvers. Once propagated, this TTL value should set back to its same TTL with other DNS records. For example, if other DNS records TTL are 1800, then this TTL 300 should be updated to 1800 as well.

For _sipfederationtls._tcp hostname,

NOTES:

TTL 300 is being set here is just to fasten up the DNS propagation to the nearby resolvers. Once propagated, this TTL value should set back to its same TTL with other DNS records. For example, if other DNS records TTL are 1800, then this TTL 300 should be updated to 1800 as well.

Review back the new records added, it should be looks similar as follows:

Next, wait for the DNS to propagate. While waiting, you may check using online DNS checker such as what is my dns.

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If you face any difficulties on the setup, please feel free to contact our support team by submitting a ticket on https://247livesupport.biz or emailing out support team at support@247livesupport.biz.