A collection does not contain any images, it is just a collection of addresses so program can find pictures. Not sure but it probably does not work across drives, because Bridge search does not either.
I agree, it's the goal that "Collection" store only the path to the picture...
But as the Dam is managed by AdobeDrive, it's "mounted" with a regular/valid path and I don't understand why the path to the picture can't be "collectible"...
browsing the Dam in Bridge, you can Drag'n Drop a picture on an active window of AI or InDD to "place" it and the "path" is well stored...
This repository is managed by AEM 5.6.1 and mounted on the desktop by AdobeDrive.
Maybe you can drop this problem in the dedicated Adobe Drive forum?
this is a very specialistic matter you are describing and not may users (if at all) here have access to the Adobe Drive that is not part of the Creative Cloud package subscription.
It seems like you are using a very sophisticated network with both Mac and PC.
I also had to look up AEM that seems Adobe Experience Manager. Also a very specialized application.
While Adobe claims a seamless integration of CC with Adobe Drive, Bridge itself is not designed (nor supported) for use over a network. Collections are by default aliases of the originals and stored on user based libraries. They should be able to read form different drives and even networks (with great care) but sharing a collection is to my knowledge only possible by manual distributing the collection file saved on the creators computer. Not sure if other stations could use this same file without problems but in theory they should provide the path to the originals, but that is theory...
Not enough of a techie to say how the collection works, but my assumption is that it does a search for addresses. So if you have your pictures on drive F the search will not go beyond drive F. Adobe Drive would a drive ???
AEM is no more than the evolution of VersionCue....appeared with CS1 until CS5
and AdobeDrive the connector for Version Cue has evolued accordingly...
But to follow your advice, a similar post is already in the Drive section
but with no reply until now...
AdobeDrive mount the AEM/DAM on the desktop as a "Volume" on Mac or as a drive as "Y:\" or any free drive letter...like any "file server"
You can also mount it with a WebDav Client but in that case, you lose the "Check-in/out" and "versioning management" features... granted by Drive