I am creating a company-wide signature for all employees. I have added a mail flow rule. It works fine with new emails. However, it shows at the bottom of the email for replies. How do I make it show up immediately after the reply?
As Chris already mentioned (thank you for the CodeTwo mention, Chris!), you need to use a third-party tool like CodeTwo Email Signatures for Office 365 https://www.codetwo.com/email-signatures/ to add signatures under the latest reply.