Allah (azj) is not an existence which has a location, as that would imply limitation and dependency.
limitation in the sense of being confined to a space, and dependency in the sense of needing a place within which to exist.
The presence of Allah (azj) is everywhere in the form of power (which manifests in numerous ways). As if it (the power) was not everywhere, there would be no existence for created beings(animate and inanimate). As everything is dependent on Allah (azj)for existence.
And Allah (azj) is free from all dependence!