A few weeks ago I turned off JSM access to several Jira users, leaving it active for just our Support team. Starting a couple days ago, I started getting emails from Atlassian telling me that a user "has joined Jira Service Management". Sure enough JSM is active for them again and I turn it off only to receive a message the next day that its back on for them. This has happened for a handful of those Jira users I had originally turned JSM off for but not all of them. When asked, the Jira users that were mentioned in these emails are not aware of any action on their part that would have triggered the emails on their behalf.
Why is this happening and how can I get it so they stay disabled from JSM?