User Manager/V3 VS V4
From MikroTik Wiki
In RouterOS version 4 User Manager test package was introduced, having major functionality and interface changes:
- Profiles used instead of Credits
- Radius CoA support added, enabling User Manager to send session termination and modification requests to radius clients (HotSpot, PPP, Wireless). In version 3, User Manager was only able to handle requests from radius clients, being unable to terminate or modify a running session
- Subscribers are no longer used. Instead users and routers now belong to a particular customer
- Each customer can have its own users/routers and share parent users/routers
- Each customer has access to users/routers belonging to any of its child customers