The Import users function in the Manage Users tab allows an administrator to quickly populate Amplify with user-information as well as ownership of items. This is very useful when importing large datasets when ownership preservation is essential. For information on how to do this, see Upload users in bulk.
When the users are imported, you will not be able to manually make changes to the users in Amplify.
If you have an active directory set up at your site, you can import all of your active directory users into Amplify. Please contact Amplify Technical Support for assistance with importing active directory users