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Product, Technology and Support news relating to MailSite email, calendar and contact server software

MailSite ActiveSync with Outlook 2013 and 2016

MailSite includes an integrated Exchange ActiveSync (EAS) protocol server out of the box.  The MailSite EAS server can be used to synchronize email, calendar and contacts with all major smartphone devices including Apple iPhones and Android phones. Microsoft introduced native EAS support in Outlook 2013.  This protocol works very well for synchronizing
email, calendar and contacts between MailSite and Outlook 2013 and 2016 for Windows.

Before setting up Outlook make sure that you are connecting to a user account that has Wireless Sync enabled within the MailSite Console. Also, make sure you have the MailSite AirSync application pool running under IIS and make sure your mail domain has a valid SSL certificate installed in IIS as Outlook requires an SSL connection for using EAS.

Associated Knowledge Base Articles

Setting up a Secure Sever for ExpressPro
Installing ExpressPro onto Windows Server 2012
Installing IIS v6 and v7 
Upgrading to MailSite Fusion 10

To Setup Outlook

  • Open up Outlook and click on the 'File' tab.
  • Click 'Add Account'.
  • Click the radio button next to 'Manual setup or additional server types'. Click Next.
  • When presented with the Choose Service screen, select 'Outlook.com or Exchange ActiveSync compatible service'. Click Next.

  • Enter your email address, server and logon information. The server address to use will be the URL for the MailSite ActiveSync server. So for example if your ExpressPro address is www.domain.com/expresspro then enter www.domain.com. Click Next.
  • Outlook will automatically test your account settings. When the connection is successful press 'Close' and your account is created.
  • Click 'Finish' to complete the setup of your MailSite account in Outlook.

Outlook will now start to download your email, contacts and calendar items from your default lists in ExpressPro.


It may take a while for Outlook to download all this data during the initial setup, depending on the size of your MailSite account and the number of folders.  By default Outlook synchronizes all three collections – email, calendar and contacts – and it is not possible to select just one or two.

Using this feature in Outlook and MailSite it is now possible to send and receive meeting requests and add them to your MailSite calendar.  This also provides full email address lookup from your MailSite contacts as they are all now synchronized with your Outlook People list.

We hope that this capability enhances your enjoyment for using Outlook with MailSite!

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