Redudant URLs for OWA RRS feed

  • Question

  • Hi

    We configured CAS servers in WNLB and configured externalOWA URL as webmail.contoso.com and it's working fine from internet. For ISP link redundancy we are planning add one more URL webmail2.contoso.com with our reverse proxy, which will point again to same WNLB cluster IP. But as far as we know we can add only one external OWA url with CAS servers. So how can we achieve this?

    Thanks in Advance


    Tuesday, January 24, 2012 7:25 AM


  • 1. You can try to force IIS on CAS to accept second URL for required virtual directories (not sure if this will work).

    2. You can publish second URL (IP from second ISP) and terminate SSL on your proxy, than establishing connection to internal OWA with proper http headers (TMG can do this).

    3. You can participate in BGP routing with your providers (expensive).

    • Edited by QRS Tuesday, January 24, 2012 5:23 PM
    • Proposed as answer by Fiona_Liao Friday, January 27, 2012 6:02 AM
    • Marked as answer by Fiona_Liao Wednesday, February 1, 2012 9:55 AM
    Tuesday, January 24, 2012 5:21 PM