The NotifyMDM server will load users into the Device Inventory (Smart Users and Devices grid) in groups/sets of one hundred (100). This helps to prevent the system from getting inundated while obtaining the user information from the NotifyMDM database.

When exporting the dashboard, it's best to let all the users load by scrolling down the end of the grid while pausing momentarily for the user information to be added in. After that is complete, scroll back up to the top of the grid and export. The Device Inventory export should show the full list by following those steps.