I would like to know how we can send an outlook meeting invite as a notificaiton.
It should be possible if you find a way to save the
Outlook meeting invite (.ics file) as a file in a process data then include that process data as a macro in the notification template of your action. This will send an email with your .ics file as an attachment.
See our administration guide about file attachment macro in https://advantys.gitbooks.io/workflowgen-administration-module-reference-guide/content/custom-notification-templates.html?h=a%20process%20data%20value%20where%20dataname%20is%20the%20name%20of%20the%20data%20whose%20value%20you%20want%20to%20add%20as%20an%20attachment%20to%20the%20email