There are 4 ways access the Mikrotik routers or switchs. You should be able to access a locally connected router using one of these methods however to access them remotely(or from other locations) you have to follow these instructions Mikrotik remote access which should ran on setup
1.The main way to connect is Winbox
2.You can use the web interface as long as it is enabled(disabled for most businesses)
3.You can SSH into it as long as its enabled(disabled for most businesses)
4.You can use winbox RoMAN(This only works for devices which allow RoMAN)