Our website provides a free download of Add2Exchange 8.11.163.154. The following version: 8.1 was the most frequently downloaded one by the program users. This program is an intellectual property of OpenDoor Software®. The software is included in Communication Tools.
From the developer:
Sync calendar, contact and task items across mailboxes and public folders alike with this award-winning Exchange server add-on. Compatible with any mobile device that syncs with your mailbox. Create group calendars and shared contact lists. Up to unlimited numbers of folder pairs.
You may want to check out more software, such as MAPILab Share'n'Sync or QuickSender, which might be similar to Add2Exchange.