I don't see why an email change would re-generate the sharing keys. Is it that difficult to contact them and request that the passwords be shared again? Just FYI, there's an email verification that will go to the old email to process the change. If there's absolutely no way to access that inbox anymore, you might have problems.
Hi we are needing to perform the same task, the email we are closing is still active but was wondering how we can do this. I couldnt find an email to contact support