Existing outlook email templates insert signature above email body
Fix signatures appearing above existing Outlook template content by recreating the email template.
You are using an existing outlook template with the Signature 365 add-in. When using the template to compose a new email, the signature is inserted before the template text.
Recreating the Outlook template is the only known way to resolve this issue.
Disabling Outlook signatures in New Outlook and OWA
Disable built-in signatures in New Outlook and Outlook on the web using Exchange admin center OWA policies.
How to enable remote logging in the Outlook add-in
Enable remote logging in the Signature 365 Outlook add-in so support can diagnose issues across supported Outlook clients.