Dynamics CRM Interface

Does anyone have any experience interfacing to Dynamics CRM? Does anyone have a gateway program that they recommend?

Currently, Dynamics CRM is running critical functions but inventory is relieved based on quarterly inventories. I have loaded inventory and vendors in and wish this information to be managed by ERPNext but flow into Dynamics.

I would prefer not to add administrative overhead with exports and imports, so if there is an interface/gateway that would be great.

Thank you,