The concept of mapped drives in Windows is user specific. This mean the OS maps these drive when a user logs in and they are
not available to any other user on the system but the one who is currently logged in.
Therefore, mapped drives results in error because they are not available to the service that triggers a scheduled job. This is an OS-level
restriction built into Windows.
Additionally, it is not a good idea to backup mapped drives. Click here
for more information.