To add/reduce users in Issue Tracking Anywhere Hosted, please follow the steps below:

1. Open http://www.dynamsoft.com/Secure/itahosted_Signin.aspx, and log in as admin.

2. In the left menu bar, click Manage Number of Users under Issue Tracking Anywhere(ITA) Hosted, and click the link on the page to change the number of users according to your need.

3. After the above steps, Administrator can add/reduce users through ITA Hosted.
http://www.dynamsoft.com/help/ita/UserGroup/User/UserList.htm