Just to notice the support, if anyone will read this: there is a small problem (that was kind of a headache for me) when accessing lync.contoso.com/mcx/mcxasyncdatachannel.ashx from iPad client during autodiscover. And then we cannot login.
Actually, and you can see it from the client log to your RP, the URL is lync.contoso.com//mcx/mcxasyncdatachannel.ashx and it happens this double slash can cause problem with some RP (not TMG). I am running on bee-ware, apache based platform. It finally
works, but it may be a small thing that is basically wrong in the code that will not impact everyone, still wrong :). Without my workaround, it went to lync.contoso.com/mcxasyncdatachannel.ashx causing a 404. And it is the only url in the process that seems
to have this problem.
Good work and let's see what's next :)