Follow these steps to add a new user in AOI:
Open AOI Registration
Click Manage Access Office Integration users and click Next
Click Add New
On the new line that has been added, click into the field under User Name
Enter the users username exactly as it shows in the product they are integrating with
Select all relevant checkboxes along the user's row.
Click the box on the left of the row next to the User Reference
Click Save selected user(s)
Click Finish
Note: Keep an eye on the Used Licence count, as you will will not be able to add a new user if all of the count has been used.