You need to have Team Management activated to see this option.
These can only be set as a role. Before assigning these to a user, set up a role.
For example, I could set up a role that only has read permissions on the CRM. This is done by:
- Select the Cog -> Manage User Accounts
- Select Manager User Role
- Click Create New Role if an appropriate one is not available
- Give the role a name and select the permissions:
- Add the role or save the changes if you are editing
- Go to the user’s details and change their role to this one