I have a workflow that uses the Add a user to AD group action. The action is set to use the correct LDAP path, user is set to a variable that renders as samaccountname (jdoe for example), and group is the name of the AD group (WebMasterAdmin for example). The credential is the owner of the AD group stored as a Nintex constant.
I've attached a screenshot.
Any ideas on why it wouldn't be working?