I was pretty confident that I did this right, however its not working, no email is sent, the data is submitted to the List.
Property for my DataValueCard2 is Choices([@'User Account Form'].Supervisor)
The OnSuccess on my form is set like this
Office365Outlook.SendEmailV2(Concat(DataCardValue2.SelectedItems, Mail,";"),"Testing HTML Link","To upload your document open the app: <a href='https://apps.powerapps.us/play/e9c2d077-4fa2-4988-9123-491a156a4594?tenantId=66cf5074-5afe-48d1-a691-a12b2121f44b&ItemID=" & Form1.LastSubmit.ID &"'>Link to App</a>");Navigate(Screen2);
ResetForm(Form1)