We use the Campaign module in Zoho CRM (rather than the mass mailing campaigns.zoho.com tool) for our event management. When we send out invitations I would like to include a link or button where they can accept or decline the invitation which then automatically updates the member status. Ideally it would also add the event to their calendar.

We currently mail-merge the invite from Outlook but completely open to other mail out tools if it helps with the solutions (we have a subscription to campaigns.zoho.com and the enterprise edition of Zoho CRM).

Hoping the community might be able to suggest a solution. Please let me know if any clarification is required.

Thanks
Alex