Redirecting OWA Urls in Exchange 2010

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One of my colleague (an EV Expert) asked me about the steps to redirect OWA url in Exchange 2010 and hence the post.

We have done it in all versions of Exchange to make it easier for users to use OWA. All they need to type in is email or mail (whatever you have set) and the browser will be redirected from http://email to https://mail.domain.com/owa (/exchange in legacy systems).

Things are easier in Exchange 2010, with the new version of IIS in 2008 R2. There is an option named “Http Redirect” which we will use to accomplish the task. Launch IIS Manager on the CAS server and navigate to “Default Web site”. Double click on “Http Redirect” under the IIS section on the right hand side.

Def Website Http Redirect Option

Check the box for redirection and type in the url you want it to be redirected to. Make sure you check the last option as well. Click on “Apply” button on the top right hand corner.

Enable http redirect on default website

IIS will push down this setting to any virtual directory underneath it, which doesn’t have the same setting explicitly defined. Hence, we need to remove the redirection from aspnet_client, autodiscover, ecp, ews, microsoft-server-activesync, oab, powershell and rpc.

Select each of the virtual directories and clear both check boxes (as in the screenshot below) & apply.

Http redirect options in other vdir

The legacy directories – exchange, exchweb and public should redirect to /owa. This is the default config, but do check. Don’t check the last option for these directories (see the screenshot below).

Http redirect on legacy vdir

Next step is to disable the “ssl requirement” for the default website. Otherwise, when a user tries to connect using http://email, an http error will be displayed. This basically means that the user is trying an http connection to a site that has https enforced.

Select the “default web site” and double click the “ssl settings” under IIS section. Uncheck the box”Require SSL” and click the apply button on the top right.

Require SSL turned off for default website

Like the redirection settings, IIS will push this setting down to the virtual directories which doesn’t have this option explicitly defined. Hence, we need to check the “Require SSL” box for the virtual directories – autodiscover, ecp, ews, microsoft-server-activesync, oab, owa and rpc.

SSL required for vdir settings

Don’t make changes to any other directories. Do an iisreset from the command prompt. Perform the same steps if you have more than one CAS server.

Your users will be redirected to the correct url from now on Winking smile

Check Pat Richard’s article if you want the process to be scripted and Henrik Walther’s post for a related OAB issue once the redirection is in place.

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14 thoughts on “Redirecting OWA Urls in Exchange 2010

  1. Robert

    I recall Exchange SPs or updates that arbitrarily changed the IIS Settings so be sure to record any changes you make and re-verify them after running a SP or update.

    Reply
  2. Neil

    Hi…Thanks for making the article as clear as possible.

    I am however one of the ones who followed this article precisely and have also done the OAB bit that still has a residual issue.

    I am migrating from Ex2003. The redirection works fine, however any migrated users get an “An unexpected error occurred. Your request couldn’t be handled” error when trying to navigate between the sent and inbox folders or when trying to compose a new message.

    this is fixed if I “uncheck” the redirect in HTTP Redirect section of the owa vdir but that causes the setting to be unchecked in the Exchange, Public and Exchweb vdirs which breaks OWA for legacy users.

    Any feedback which helps resolves this issue would be greatly appreciated.

    Reply
  3. Eatsam

    Hi Rajith,

    We are using Exchange 2010 and having problems with internal OWA, sharing calendars and setting automatic replies.

    I am unable to access internal OWA. cannot locate in outlook 2010 account settings.

    Automatic replies show the error message “your automatic reply settings cannot be displayed because the server is unavailable, please try later”.

    I am unable to share calendars to other users. When I try to share the calendar it gives an error message “error while preparing to send the sharing message”

    Also Auto configuration unable to determine the setting when I do Test email auto configuration.

    Reply
    1. Rajith Jose Enchiparambil Post author

      Hi Eatsam,

      This means that all the Exchange urls are not configured properly. Configure them and make sure that the urls are covered by the internal Exchange certificate.

      Thanks.

      Reply

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