Infelizmente, o pop só processa emails, não calendários.
Felizmente, existem várias maneiras de Compartilhar um calendário do Outlook com outras pessoas .
O melhor para você é provavelmente compartilhar um calendário publicando on-line. Aqui estão os bits relevantes da página acima (negrito por mim):
You can publish your default Outlook 2010 Calendar to the Internet, which enables more people to view it. Publishing an Internet Calendar requires neither the publisher nor the user to use an Exchange account.
If you publish a calendar on Office.com, you can control who can access your calendar on Office.com. You are the only person who can change your calendar, and you can only do so through Outlook. In your default calendar, on the Home tab, in the Share group, click Publish Online, and then click Publish to Office.com.
If you have access to a web server that supports the World Wide Web Distributed Authoring and Versioning (WebDAV) protocol, you can choose to publish calendars to that server instead. However, publishing to Office.com provides improved control over who can access your calendar. In your default calendar, on the Home tab, in the Share group, click Publish Online, and then click Publish to WebDAV Server. For more information, see Publish your calendar on a WebDAV server.