Some users of ArchiCAD may be unaware of where the objects they are loading are coming from.
It can be even more confusing with office libraries being used from a server.
There is an easy way to find out where the library is located to allow you to maintain these file location.
If you go to File>Libraries & Objects>Library Manager you can choose any of the libraries in your linked libraries & the location of this library will be displayed underneath:
The other embedded library is stored within the actual file (has no location) and BIM Server Libraries will be stored on your BIM Server.