Yes, you will be able to login JIRA using users in Crowd if it is setup properly. You won't have to create a local account in JIRA for each user, but you have to make sure the group for the users in Crowd is included in JIRA Users in the Global Permissions.
The following link might help https://confluence.atlassian.com/display/CROWD/Integrating+Crowd+with+Atlassian+JIRA
Hey admins! I’m Dave, Principal Product Manager here at Atlassian working on our cloud platform and security products. Cloud security is a moving target. As you adopt more products, employees consta...
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