Tabbles enables you and your team to tag files and folders also in a folder synchronized in the cloud:
As long as you (and everyone sharing the Dropbox/Sharepoint or Google Drive file stream folder with) are  synchronizing the folder(s) on your (their) PC, then you can tell Tabbles to “treat that folder on that PC as cloud folder”. Check the setup instructions for Dropbox/Sharepoint. or Google Drive (using file stream).
The same process can be used for folders synchronized directly, for example with a backup server.