Firstly navigate to Administration in the sidebar, then to Expenses and then to Categories.
You can add claim categories to all or multiple users on the system at the same time.
To add the category to a group of users or all users in the system click on the People icon next to the category.
Once on the next screen use the filter options to display different lists of users.
Click the arrows to add individual users, or you can click Add all to add this category to all users on the system.