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# MDaemon Email Server 26.0

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ActiveSync System | Scroll Prev Top Next More

MDaemon includes support for "ActiveSync for MDaemon," which is a separately licensed over-the-air (OTA) ActiveSync server. This server is capable of synchronizing a user's Email and PIM data (i.e. Contacts, Calendars, and Tasks) between his MDaemon/Webmail account and an ActiveSync capable device.

If you enable ActiveSync for MDaemon the first time using a trial key, it will operate for 30 days. After that, if you wish to continue using it you can acquire a license key from www.mdaemon.com or your local distributor/reseller.

ActiveSync is a web-service extension that only works on ports 80 (for http) and 443 (for https). This is an ActiveSync implementation requirement. If ActiveSync is enabled and you are using Webmail's built-in web server, but it is not running on port 80 or 443, then it will automatically begin running on port 80 in addition to whatever other ports you have configured on the Web Server and SSL & HTTPS screens. If you are using another server for Webmail such as IIS then you must manually configure it to use port 80 or 443.

If you intend to run ActiveSync under IIS you must call the ActiveSync DLL (MDAirSync.dll) when "/Microsoft-Server-ActiveSync" is requested. This is the request that all the ActiveSync clients will use. Some versions of IIS do not have this capability without downloading, installing, and configuring third party software.

| All first time syncs with ActiveSync are a one way sync from the server to the device. You will lose related data on the device when you sync with ActiveSync for the first time. This is an ActiveSync implementation requirement. You should therefore backup your device data before using ActiveSync for the first time. Most devices that support ActiveSync warn the user that "device data will be lost," but some do not.

Enabling/Disabling ActiveSync

Click Enable the ActiveSync protocol to turn on ActiveSync for MDaemon. Then you can use the Domains options to control whether or not it is available to all or some of your domains.

User Interface Options

Enable editing of advanced policy options

Enable this option if you want the Advanced Settings tab to be visible on the ActiveSync Policy Editor. It contains various advanced policy settings that in most cases will not need to be changed. This option is disabled by default.

Disable all "Are you sure?" confirmation prompts

By default when you change certain ActiveSync settings you are presented with a prompt asking you if you are sure that you wish to make the change. Click this checkbox if you wish to disable those prompts.

Create quick access Setup menu items

If you enable this option, the Setup » ActiveSync menu in MDaemon's application interface will be changed, adding links to the ActiveSync Connections monitor and the Log Viewer/Analyzer. Note: when this option is disabled, those tools can still be reached by right-clicking ActiveSync under Servers in the Stats pane of the application interface.

### AutoDiscovery Service

MDaemon supports the AutoDiscovery Service, which allows users to set up an ActiveSync account with just their email address and password, without needing to know the host name of the ActiveSync server. AutoDiscovery requires HTTPS to be enabled.

See:

Account Editor » ActiveSync

ActiveSync » Domains

SSL & HTTPS

Web Server

MDaemon v26.0.0 - March 2026. Copyright © 1996-2026. All rights reserved. MDaemon Technologies