Exchange 2013 co-exsting with Exchange 2007 Prompting Clients for Authentication

We have this exact code within our iRule already. Here is the information contained in the headers (1st two are the 401's and the last one is the 200) for autodiscover. The auth scheme for autodiscover is Basic, Windows Auth and oAuth.

(1) ------------------------------

HTTP/1.1 401 Unauthorized

Cache Cache-Control:private Date:Mon, 24 Nov 2014 17:59 GMT

Cookies / Login Proxy-Support: Session-Based-Authentication WWW-Authenticate: Negotiate WWW-Authenticate: NTLM WWW-Authenticate: Basic real="autodiscover13.yyyyyy.com"

Entity Content-Length: 0

Miscellaneous request-id: fd058829-34ca-44fa-93d4-33f2d4294a7 Server: Microsoft-IIS/8.5 X-AspNet-Version: 4.0.30319 X-CasErrorCode: UnauthenticatedRequest X-FEServer: CAS01 X-Powered-By: ASP.NET

(2) ------------------------------

HTTP/1.1 401 Unauthorized

Cache Date:Mon, 24 Nov 2014 17:59 GMT

Cookies / Login Proxy-Support: Session-Based-Authentication WWW-Authenticate: Negotiate <> WWW-Authenticate: NTLM WWW-Authenticate: Basic real="autodiscover13.yyyyyy.com"

Entity Content-Length: 0

Miscellaneous request-id: 5080f396-3446-4740-9396-f166529dc15b Server: Microsoft-IIS/8.5 X-FEServer: CAS03 X-Powered-By: ASP.NET

(3) ------------------------------

HTTP/1.1 200 OK

Cache Cache-Control:private Date:Mon, 24 Nov 2014 17:59 GMT Vary: Accept-Encoding

Cookies / Login Persistent-Auth: true Set-Cookie: X-BackEndCookie=<>;path=/Autodiscover; HttpOnly

Entity Content-Length: 4552 Content-Type: text/xml; charset=utf-8

Miscellaneous request-id: 0d4a2df9-9085-4dd0-b16d-44df3cfad488 Server: Microsoft-IIS/8.5 X-AspNet-Version: 4.0.30319 X-BEServer: CAS08 X-CalculatedBETarget: CAS09 X-DiagInfo: CAS08 X-FEServer: CAS03 X-Powered-By: ASP.NET