I have a Lync 2010 setup deployed, Linux Reverse Proxy for web services. All of it seems to work outside of the iPhones, logging into Lync from OUTSIDE the network.
Android devices are able to connect inside and outside the network, the MS Lync Connectivity Analyzer reports positive outside the network as does the remoteconnectivity online tool.
If I connect an iPhone while on the inside LAN, and disconnect or leave the office while logged in the client will remain connected normally. If I disconnect, or try to login from outside the network it will fail. "Failed to process the server response. Please try again. If the problem persists, contact your support team"
The Client log reports from the iPhone
<div id="header"><h1>Server Error</h1></div>
<h2>401 - Unauthorized: Access is denied due to invalid credentials.</h2>
<h3>You do not have permission to view this directory or page using the credentials that you supplied.</h3> </fieldset></div>
/Users/comobuildadmin/icomo/private/se_wave1_idx/src/dev/CoMo/applicationLayer/_buildIos/../infrastructure/private/CLogonSession.cpp/1079:Auto-discovery failed, aborting sign-in!
Lync[107:907] is not a valid email address.
On the reverse Proxy I can see access denied errors.
/webticket/webticketservice.svc HTTP/1.1" 401 1165
/groupexpansion/service.svc/mex HTTP/1.1" 400 312
I had this working with an older ISA server, wildcard certificate on the outside interface and an internal certificate on the Lync Server. This was for testing. When I replaced the internal certificate with the Public SAN certificate I could not longer use the ISA server because the SAN certificate has the TLD name as its subject and did not match the FQDN.
The linux reverse proxy has the same SAN certificate as the Lync Front End server and includes both Lyncdiscover, and the FQDN of the front end.
This strikes me as a certificate problem because it worked before. I am not sure why only the iPhone cant login from the outside. I have adjusted the timeout values, rechecked the keys and the certificate chain. If I use the manual server entry option on the mobile client, it will not login or error. It just hangs.