OK, thanks. This clarifies things but on other hand makes things a bit more complex: do we have documented a detailed description of the the files and directories (groups) operations in this case. For example, what happens if I move a directory on DEVONThink To Go or create a new file etc.
Also, one of my use cases was the use of company confidential files that cannot be taken out of OneDrive: I have successfully setup a database on top of the files of interest and worked successfully for a while but based on what you say, if I sync this database with the mobile devices it will take the files out of OneDrive and store them locally on the device. Is this correct understanding?