To send user-invitation emails or re-invitation emails Client Service relies on SendGrid as email delivery service and uses SendGrid Dynamic Templates for the actual content of the sent emails.
The Client Service is configured to use a specific SendGrid Dynamic Template ID (Azure App Configuration Service with key hsm-clse-MailConfiguration:InviteUserTemplateId). SendGrid Template Versions are used to support invitation emails in multiple languages. For this each version is named with a suffix that specifies the locale of the template version <TemplateName>_<BCP-47 tag> e.g. InvitationEmail_de-AT .
The evaluated locale that a invitation email shall be sent in is used to find the best matching dynamic e-mail template on SendGrid.
