NetVanta UC Series 5.4.1 Supplemental Functionality Details for Outlook 2013 Support
32 bit and 64 bit Outlook 2013 is only supported as part of Office 2013 Standard/Professional Plus (VLP volume licensing and .msi installers)
Click to Run Editions are NOT supported (subscription based/virtualized editions) and include:
Click to Run is a virtualized on-line version of Office. The Click to Run Edition does not support add-ins which is required for support with the NetVanta UC series.