Is the SIPS SRV external DNS record required for MRA expressway if you are NOT using B2B functionality

[MARK BEDWANI]

Hi, I am in the process of configuring Expressway MRA for a client that is also concurrently using VCS C&E for B2B. The issue I have is that the MRA documentation does not clearly state if the _SIPS SRV is required for MRA expressways if you are NOT using them for B2B calls. As this SRV (SIPS) is also used for the VCS pair.

MRA Document:

Public DNS
The public (external) DNS must be configured with _collab-edge._tls.<domain> SRV records so that
endpoints can discover the Expressway-Es to use for mobile and remote access. SIP service records are
also required (for general deployment, not specifically for mobile and remote access). For example, for a
cluster of 2 Expressway-E systems:
Domain Service Protocol Priority Weight Port Target host
example.com collab-edge tls 10 10 8443 expe1.example.com
example.com collab-edge tls 10 10 8443 expe2.example.com
example.com sips tcp 10 10 5061 expe1.example.com
example.com sips tcp 10 10 5061 expe2.example.com

So my question is simple, is the SIPS SRV external DNS record required for MRA expressway if you are NOT using them for B2B ?

As you can see above the MRA documentation does say that SIP SRV records are also required "for general deployment, not specifically for mobile and remote access", should this say only required for B2B ?

Mark.

[4smacon]

Mark, I too am in search of this answer. Will provide an update once I have further information.

Thanks.

[MARK BEDWANI]

Does no one know the answer to this question ????

[Mike Assel]

Mark, I would say that for MRA only, sips SRV record is not needed, only collab-edge._tls.  See this presentation for more info (especially slides 28 and 29). 
https://www.ciscolive.com/online/connect/sessionDetail.ww?SESSION_ID=78766&backBtn=true
Lots of good details in here.

Thanks, Mike