Changing the username of a user in the cloud admin portal is a process in five steps.
Login to the Cloud admin portal at https://viewpoint.partner.manage.cloudworkspace.com
Once there click on Users and Groups
3. Next, search for and click on the name of the user whose username needs editing.
4. Hover over the user's username until you see a pencil icon. Click the pencil and then change the username. Once complete, click outside the edit box for the username and the name should update automatically.
You're done!