"@Mention" Security right now is given at a Global Level(Global Permissions - Browse Users). . However we use JIRA Projects for individual clients. We don't want one client being able to type "@" and see a list of user names from other projects. Is their away to scope this down to the project level?
JRA-7467 sounds like it should remedy your issue. Unfortunately, the fact that its still open means this is still in progress.
Others may know of a better workaround, but I'm not aware of one off the top of my head.
Perhaps something has changed since 2014, but @Mention security is project-level, not global. The project 'Browse' permission is checked. This can be verified experimentally, or seen in the source at SortedMentionableUserSearcher.java#searchForUsers()
JIRA's User Picker is different - it is used (mostly) when there is no issue in scope, and so has to rely on the global Browse Users permission.
It looks like you're new here. Sign in or register to get started.