Monday, July 03, 2006

MS Exchange Blog : OWA and multiple SMTP domains

MS Exchange Blog : OWA and multiple SMTP domains:

OWA and multiple SMTP domains

If you configure your Exchange 2000 server to receive mail for an additional SMTP domain, you may notice that users with this additional domain as their SMTP address may not be able to access Outlook Web Access. You need to make some configuration changes for this to work.

Let's assume you install your Exchange 2000 server such that all users have an SMTP address in the format of user@abc.com, but later require some users to have the user@def.com address.

By default, the /exchange virtual directory will point to the abc.com domain. Users with the def.com domain will not be able to access OWA using the /exchange virtual directory.

To resolve this issue, you need to create a new HTTP virtual directory, and point this to the def.com recipient policy that you will have created in Exchange System Manager. Here's how to do this:

1. Run Exchange System Manager, and navigate to your Server / Protocols / HTTP / Exchange Virtual Server.

2. Right-click Exchange Virtual Server, and choose New / Virtual Directory.

3. Give this new virtual directory a meaningful name, and ensure that the 'Mailboxes for' radio button is selected.

4. Click the Modify button, and choose the def.com domain.

5. Click the Access tab, and set the authentication options as required.

6. Close the property windows by clicking OK, and you will now see the new virtual directory in Exchange System Manager. It is now important to wait a short while, to allow the DS2MB process to create the virtual directory in the IIS metabase.

You can then use a URL of http://servername/def to access OWA for users with a user@def.com SMTP address, whereas a URL of http://servername/exchange is used for users with a user@abc.com SMTP address.

Neil Hobson

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