Hello Heidi,

This is already possible in the software!

In the standard mail, there is a link to add the appointment to the customer's private agenda.

If you use a personal email template, you should use the [calendar_link] tag in your email template. You can also find more information in the following article: https://help.optios.net/nl/articles/3985145-hoe-kan-ik-de-tekst-in-de-bevestiging-en-herinneringsmail-aanpassen

Do you have questions about setting up? Please feel free to contact support via the chat function or to help@optios.net

Is that no longer in it? Was it in the past?