Exchange 2010 CAS Insatllation

Posted on 2011-04-27
Last Modified: 2012-08-13
I will be installing 2-2010 CAS Servers in and existing 2003 Exchange Organization.  The CAS servers will be configured into a CASArray.  Should I check the  "Internet Facing" option on both servers during setup?

Or should I wait until the CASArray is configured then configure the CASArray fot "Internet Facing"?  
Question by:JimmyRiverside
    LVL 7

    Accepted Solution


    You can install Exchange 2010 in your existing Exchange 2003 environment without affecting the end users.

    There is No issue in Checking/unchecking the “The Client Access Server role will be internet-facing” check box during the installation of CAS Role.
    It wont make any impact to your end users who are accessing OWA through Exchange 2003.
    Actually you need to change your internal and external DNS records to point towards exchange 2010 CAS server for accessing the OWA and other services through Exchange 2010 CAS Server. Until then End users wont be able to access the Exchange 2010(right now your DNS records configured to point towards your exchange 2003 CAS Server).
    Until you do these DNS changes End users will be able to access the OWA through Exchange 2003 without any issues.
    LVL 7

    Expert Comment


    If you did not configure the external domain during the installation of the CAS roles, you can of course do so using the Exchange Management Shell (EMS) or via the property page of each vdir like it was possible in Exchange 2007. But Exchange 2010 also makes you do this via a new “Configure External Client Access Domain” wizard. This new wizard can be accessed simply by right-clicking on Client Access under the Server Configuration workspace in the Exchange Management Console (EMC)
    LVL 24

    Expert Comment

    You can do it either during installing the CAS role or later from the console. Not a big deal. You can install the CAS array after you have both CAS servers installed.

    There is no real order, as long as all components are configured at some point.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Why do Marketing keep bothering you?

    Is your marketing department constantly asking for new email signature updates? Are they requesting a different design for every department? Do they need yet another banner added? Don’t let it get you down! There is an easy way to manage all of these requests...

    Set OWA language and time zone in Exchange for individuals, all users or per database.
    ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
    In this video we show how to create a Shared Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Recipients >> Sha…
    The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…

    779 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    19 Experts available now in Live!

    Get 1:1 Help Now