The Office 365 Transition Guide for Administrators (no longer available) includes steps for making DNS updates for your company’s domain. However, the instructions aren’t very clear on the exact format of the values that you may need to provide to your DNS provider.
After a bit of investigation, we were able to take the values in the Transition Guide, and find the correct format for our DNS provider. The table below shows the DNS entries used by Deliveron to prepare for our Office 365 transition. The values may be used as a template, replacing “deliveron.com” for your company’s domain.
|Lync *||_sip._tls.deliveron.com||SRV||1 100 443 sipdir.online.lync.com.|
|Lync *||_sipfederationtls._tcp.deliveron.com||SRV||1 100 5061 sipfed.online.lync.com.|
* Make sure to include the period at the end of the line in the SRV entry