Using Admin Toolbox it is possible to perform bulk change actions for all your users and roles across all Jira projects! These changes include
Bulk adding a user or role to multiple projects
Bulk removing a user or role from multiple projects
Update users and roles throughout multiple projects at once
If you want to update multiple roles for a user in several projects, our bulk change feature got you covered!
If you still have questions, feel free to refer to our support team. You can also download our app from the Marketplace.