How to configure Mikrotik OPENVPN Server
1- Create IP Pool for OpenVpn Clients
IP > IP Pool > Add IP Pool
For Example I have taken range 172.16.100.100-172.16.100.150
This IP address will be assigned to OpenVpn Clients and Mikrotik Routers.
2- Create OpenVPN Profile
Go to PPP > Profiles > Add New Profile