Syncing from Outlook calendar to CRM Meetings tab

Syncing from Outlook calendar to CRM Meetings tab

Hi

I have enabled syncing in the Marketplace > Microsoft section of settings in CRM. New Meetings created in the Meetings section of CRM appear in a new Outlook calendar, which is groovy. 

I have created a calendar appointment in my Outlook with a CRM contact in the attendee section. The contact is in CRM only once with the same email address. However this Meeting never appears in either my CRM Calendar or the Meetings section of CRM. 

Any ideas why that may be?

Olly