A PowerShell script that uses the Dropbox Business API to retrieve all users in your tenant. Supports pagination for large tenants.

DropboxAPI-ListMembers.ps1

#API token from https://www.dropbox.com/developers/apps
$token = 'Bearer XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'

#Create initial DfB team members array:
$teammembers = Invoke-RestMethod -Uri https://api.dropbox.com/2/team/members/list -Body '{}' -ContentType "application/json; charset=utf-8" `
            -Headers @{ Authorization = $token } -Method Post
$allDropboxUsers = $teammembers.members.profile

#Keep paginating until we get all the account members.
while($teammembers.has_more -eq "True"){
    $json = '{"cursor": "'+$teammembers.cursor+'"}'
    $json
    $teammembers = Invoke-RestMethod -Uri https://api.dropbox.com/2/team/members/list/continue -Body $json -ContentType "application/json; charset=utf-8" `
            -Headers @{ Authorization = $token } -Method Post
    $allDropboxUsers += $teammembers.members.profile
}

return $allDropboxUsers