I created a process builder flow that will send an email when a lead is converted in lightning.
I created a hidden formula on the lead field that pulls in all the ConvertedID's in one field and I use that field to send out my email. the formula works but the look is not what the users what to see. Everything is group together and it doesn't look like the generated email that is sent from salesforce when in classic view.
Here is my formula code: HYPERLINK("Account:","https://test.salesforce.com/"& ConvertedAccountId)+ HYPERLINK("Contact:","https://test.salesforce.com/"& ConvertedContactId)+ HYPERLINK("Opportunity:","https://test.salesforce.com/"& ConvertedOpportunityId)