Synchronization of Exchange mailbox data is supported on mobile devices with Android 2.0 OS or later. Before you start to configure a mobile device, you should do the following:
Note: most of the Android devices have default Gmail app installed.
To connect default Gmail app, use the following settings:
On some Android devices there are only two fields for setting up an Exchange account: Email address and Password. Use the following settings to set up the account:
Enter the Server address (SEE SMS) in the new field that will appear and change the Email address field to your primary email address. Tap Next to finish the setup.
Note: if the 'Cannot connect to the server' error comes up during configuration, try to switch from Wi-Fi to your mobile network or vice versa.
Read the Knowledge Base article ActiveSync Errors On Android Devices for common ActiveSync issues on Android-powered devices.