Confused with Lync 2013 Autodisocver and mobile app

Question

Hello
i am confused about some stuff related to lync 2013 client discovery and mobility:
1) internal client will try to resolve lyncdisocverinternal , then why on the internal CA request i can see lyncdiscover &lync disocoverextrnal?
2)for auto discover to work from extrnal does it look for the A record "sip.mydomian.com" or its searching for lyncdisocver?
3) does Mobility (client for ipad or Andriod) try to connect to edge server if if its located on the internal network or it can understand if its on the internal wifi to use internal and its outside the network it will use external?
please help

Answer 1

All Mobility Service traffic goes through the reverse proxy, regardless of where the origination point is—internal or external.
The Lync Server 2013 Autodiscover Service returns all Web Services URLs for the user's home pool, including the Mobility Service (Mcx and UCWA) URLs. However, both the internal Mobility Service URL and the external Mobility Service URL are associated with
the external Web Services FQDN.
You can run the command Set-CsMcxConfiguration –ExposedWebURL internal.
The parameter internal indicates whether the URL used by the Autodiscovery Service is accessible to users both inside and outside the organization firewall (External) or only accessible to users inside the firewall (Internal).
If you set to internal, you can’t connect externally.
For details, check
http://technet.microsoft.com/en-us/library/hh690030.aspx
Lisa Zheng
TechNet Community Support