How to configure ActiveSync without autodiscover


While autodiscover is the standard way for email clients to determine the ActiveSync settings needed, sometimes you may require that ActiveSync is configurable without requiring an SSL autodiscover URL. This article explains the basic requirements for ActiveSync clients. Not all email clients will work, as some require autodiscover and some require valid SSL certificates to be used.  


Firstly, create the DNS record for ActiveSync:

  1. 1. Create an A record in your DNS called, where is the domain you are wishing to connect to. This need to point to the IP address of the MailEnable server.

Add the record as a host header under IIS:

  1. Open the Microsoft Internet Information Services control panel applet.
  2. Expand the folder tree and click on the MailEnable Protocols site.
  3. In the "Actions" pane click on "Bindings" and then on the "Add" button.
  4. Select HTTP under the "type" selection and then select the IP the domain is bound to.
  5. Enter the DNS record you recently added as the host name, e.g.
  6. Click OK.

You can configure this to use SSL if you wish, but please use a valid certificate. Most clients will not work at all with a self-signed certificate. Test in a web browser that you are hitting the correct website:

  1. In a web browser, enter the URL (where is your domain)
  2. You should get a web page with the heading "MailEnable Services" with a page of various protocol information.

Now you can add the account to your email client. This can vary depending on the software you are using, but basically you need to do a manual setup. Apple devices may require that you firstly fail the auto-configuration before allowing you to manually configured, and others may allow you to go straight to a manual setup once you enter the email address for the account. When you select you are configuring an ActiveSync account, the basic settings you need to enter are:

Email address: email address of the account

Domain\username: This would be the postoffice name and the username, e.g. postoffice\mailbox.

Exchange server: This is the URL you have configured earlier, e.g.

Once you enter these details you should be able to create an account.


Class:HOWTO: Product Instructions
Revised:Wednesday, May 16, 2018