Adding Users to the Infor OS Use the instructions to add users to the Infor OS. Sign in to Infor OS as an administrator. https://MingleServer:port/infor Navigate to User Menu > User Management. On the Manage/Users screen, click the Plus icon for Add new Item. On the Add Users from Identity Repository window, enter the name of the active directory user you want to add. Click Load. Select the check box next to the user(s) you want to add. Note: You can add multiple users. Click OK.