I keep this short gang. My partner and I have a small commercial wireless deployment. we are running v6.7 RouterOS as the core router. We set up several VLANs to maintain domain segmentation and whatnot. Now though there are complaints of having to log in too many times. So the question is: Once a user has authenticated, how do we let said user roam across APs in different VLANs. This is something Aruba does so I figured MikroTik probably does too.

Any help is appreciated

What type of authentication are you talking about wifi auth like 802.1x WPA2-enterprise or hotspot?

For wifi auth as long as your settings match across APs SSID, auth type, password if PSK you should be fine and roaming happens normally with no additional authentication.