Ok we have a solution from Support on this. So basically I had a custom user creation action that uses a AD User template. In the form I had removed a few fields that I didn't think was important for the user to see to complete the form. Those were DisplayName and User Logon Name (pre-Windows 2000). I had to re-add those to the form as a work around to make this work again.
Here's the response and steps from Support on this:
Thank you for all the provided details. The issue is caused by a bug in Adaxes 2018.1. We will fix it in the next update to Adaxes 2018.1. As a workaround for now, you need to add the sAMAccountName property to the Custom New User using Template action form. To do so:
1. Open Adaxes Web Interface Configurator
2. In the top left corner, select the Web Interface.
3. In the left pane, click Actions.
4. Double-click the Create New DFCU User action.
5. Activate the Form Customization tab and click Customize Form.
6. Select the General section and click Add below the Fields section.
7. Select User Logon Name (pre-Windows 2000) and click OK three times.
- Save the changes.