Just noting for others who might be confused that the Bulk Add button doesn’t seem to be there anymore, but the Add Members dialog takes a comma-delimited list.
The problem is that I was assuming that email addresses that were not in the database already would be ignored, as per
https://meta.discourse.org/t/bulk-add-to-group/34979/10?u=adamengst
Unfortunately, that’s no longer true, and Discourse sends an invitation. That might seem like the right thing to do, but since lots of people have multiple addresses, I ran into numerous situations where people did already have users in Discourse, but under different addresses. So they got an email invite, which I then felt that I should cancel, so they didn’t accidentally end up setting up another account.
It would be very helpful if Discourse could indicate when you paste the addresses into the Add Members dialog, which are recognized as matching a user and which don’t match, either because the user isn’t in the system yet, or is with a different address.