i installed Exchange 2013 in existing environment 2010 (SP3), mailbox still on exchange 2010, are published through TMG Gateway.
OWA access work well, but ActiveSync on smartphone doesn’t work. "Unable to access server"
In TMG publishing rule i set basic auth, like in activesync virtual directory on Exch 2010 and 2013 too.
I already do that http://technet.microsoft.com/en-us/library/dd439375%28v=exchg.80%29.aspx
, without results.