Student or Learner
I, few times, came across sentences containing modal verbs which couldn't be interpreted logically except by assuming that a modal verb means 'if'.
"Have James been enrolled to the university next year, he will suffer change and not having time to have much fun"
I googled with many different keywords, but I couldn't find anything around.
That sentence doesn't work and have is not a modal. Should can be used with that meaning if you invert it:
Should you see him, please tell him to call me. (= If you see him, please tell him to call me.)