ProcedureScreenshot
1. Grant the role of Local  Admin to the user (refer to How to update User Role to idea manager/ local admin)
2. Assign the user as the idea manager of your tenant site: 
a) Go to Administer > Full Tenant List. Click on your Tenant Name (e.g. RIC Brussels) 

b) Click on Define Local Admins & Idea Managers

c) At the Local admins box, search and Add the user by clicking on the Plus sign (+)
d) Click Submit