Currently Exchange recommends that the Autodiscover service be separated from the default Web site on the Client Access Server (CAS) server if it is heavily used.
To host the Autodiscover service on a separate site but on the same computer as other Exchange features, you must follow these steps in order:
- (Required) Configure the SSL certificate - Configure a
valid SSL certificate from a CA that the client computer
trusts.
- (Optional) Create a separate site to host the Autodiscover
service - This step is recommended if your SMTP address domain
experiences high traffic. For example, consider a situation where
your main Web site is www.contoso.com and your SMTP address is
contoso.com. In this case, we recommend that you host the
Autodiscover service on a separate site. Create an Autodiscover
virtual directory under a different Internet Information Services
(IIS) Web site by using the New-AutodiscoverVirtualDirectory
cmdlet.
- (Optional) Remove the default Autodiscover virtual
directory - If you have decided to host the Autodiscover
service on a separate site, you must delete the Autodiscover
virtual directory that was created by Setup on the default Web site
in Internet Information Services (IIS) by using the
Remove-AutodiscoverVirtualDirectory cmdlet.
- (Required) Create a new Autodiscover virtual directory in
IIS - For the Autodiscover service by running the following
command:
New-AutodiscoverVirtualDirectory -Websitename <websitename> -BasicAuthentication:$true -WindowsAuthentication:$true.