The DITA Exchange Product Documentation is available from various sources:
The DITA Exchange Word Editor End User Guide is available from DITA Exchange Word Editor. Click the >?< button and the End User Guide is available.
The DITA Exchange Server End User Guide is available from the DITA Exchange Server User Interface in SharePoint. Click the >?< button and browse the End User Guide.
The DITA Exchange TopicPicker Installation Guide is available from here.
The DITA Exchange TopicPicker End User Guide is available from here.
The DITA Exchange TopicPicker Trial Software can be downloaded from here.