They need a valid email address. That is attached to their Jira account by your admins, or by them.
I suspect you're actually asking something different though - could you explain what the problem is?
I'm sorry, that does not make any sense to me.
What does "taken as a component in Jira"? Components are not users, they're components.
What has the email group got to do with it? Is that a group within Jira? How do you expect to get mail to that person?
What's an S1 exchange server? Do you mean the user has a valid email? Have you got that in their Jira account?
Hey Community mates! Claire here from the Software Product Marketing team. We all know software development changes rapidly, and it's often tough to keep up. But from our research, we've found the h...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs