I am hoping somebody can help or has ran into this. We installed Exchange 2013 CU15, and everything is working. We changed all of our URLs to Legacy.domain.com and autodiscover and mail.domain.com point to 2013. Outlook and OWA work fine for both users on 2013 and 2007. The issue is our mobile devices. Users on 2007 can not get connected on the mobile device. Users on 2013 work fine without issues. I have set the External URL on 2007 for Active Sync to $null as well. When running the exchange connectivity test and the error I get is below. Anybody have any ideas?
Attempting to send the OPTIONS command to the server. Testing of the OPTIONS command failed. For more information, see Additional Details. Additional Details A Web exception occurred because an HTTP 400 - BadRequest response was received from Unknown. HTTP Response Headers: request-id: 5032f128-653d-461b-ae4a-725f5d107543 X-CalculatedBETarget: Internal_Server_Name X-MS-BackOffDuration: L/-470 X-DiagInfo: Internal_Server_Name X-BEServer: Internal_Server_Name Cache-Control: private Content-Type: text/html; charset=us-ascii Set-Cookie: ClientId=RT0VAICUKYNZLSMKPQCG; expires=Thu, 04-Jan-2018 13:33:39 GMT; path=/; HttpOnly,X-BackEndCookie=S-1-5-21-576079393-3807162691-548639514-56446=u56Lnp2ejJqBy8jJmcnIyMfSyM7HmtLLyMua0p6emcjSmcqazMzJx8vLnJnOgYHNz87I0s/N0s/Mq87MxczMxczG; expires=Fri, 03-Feb-2017 13:33:39 GMT; path=/Microsoft-Server-ActiveSync; secure; HttpOnly Server: Microsoft-IIS/8.5 X-AspNet-Version: 4.0.30319 X-Powered-By: ASP.NET X-FEServer: Internal_Server_Name Date: Wed, 04 Jan 2017 13:33:39 GMT Content-Length: 346 Elapsed Time: 412 ms.
Anthony Zepeda