From the Android app’s store (Google Play), search for the freeware “Tasks & Notes for MS Exchange” (made by UniqTec).

You can sync notes and tasks that are stored in Group Office WebMail.

Setup is simple. Once installed, click Menu on your phone > Tools > Accounts.

Click on the + sign to add a new account.

Enter your e-mail address, password and as type, choose “Exchange ActiveSync“.

In the Server field, specify the following syntax: domain–com.emailarray.com

For example, if your domain is mydomain.com specify mydomain–com.emailarray.com

Click on Continue.