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
Do you own more than one Server or Data Center product? Do you have challenges provisioning users across your Atlassian products? Are you spending a lot of time integrating each Atlassian product wit...
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