Stolen gear

here’s my question if my microwave was stolen and it’s linked to my serial number in this account is there any way to find out when someone’s been on it or where it is?

If you need details on how N.I. account service works and to what extend that N.I. track devices then you will have to ask N.I. Account Support . I doubt though that N.I. is tracking registered devices other places than in their own account system and on own servers. N.I. might be working with law enforcement where required. So maybe your question ought to be directed at law enforcement or insurance companies ?

Can someone else use it even though I have the license to it?

Use it ? probably yes ! , register it to their N.I. account without your approval ? Most likely not. Many people are unhappy with that N.I: in their mind is difficult to work with when registering used hardware. But as far as I know then if you have registered the hardware to your account then N.I. will try to contact you if someone else is trying to register the device to their account without having a proper transfer ID. What N.I. otherwise do in such cases I don't know , again then you will have to ask N.I. Account Support.

Quote Matt_NI : All you need to know about License Transfer

In case that you need guidance contacting support : Please read : how to get support !