DMVPN eliminates the need to configure crypto maps tied to the physical interface, dramatically simplifying the number of lines of configuration required for a VPN deployment (e.g., for a 1000-site deployment, DMVPN reduces the configuration effort at the hub from 3900 lines to 13 lines). Adding new spokes to the VPN requires no changes at the hub.

One must have a frames-capable browser to use Fortinet KB. Get one here: DMVPN Phase 1 configuration CCNP 300-101 (v-82) - YouTube Mar 12, 2015 MultiPoint TV - Series with English Subtitle No Ads

Dynamic Multipoint VPN (DMVPN) - Network Angle

Dynamic Multipoint VPN - Routing and Switching

Dynamic Multipoint VPN on GNS3 | geekdudes

Jan 20, 2015 Dynamic Multipoint VPN (DMVPN) - Network Angle Jan 16, 2017 Dynamic multipoint VPN setup: CradlePoint and Cisco router