Hey @MattF! The meetings should be excluded if they are only with users in HubSpot or their emails are hosted on your domain (see the knowledgebase article):
HubSpot automatically prevents any events from being added for members of your organization based on email domain, and existing users in your HubSpot account.
If you're seeing that not to be the case, please reach out to our Support team so they can dig into your examples! If they don't meet this criteria, I'd recommend filing a new ideas forum submission about having some sort of Meetings equivalent to our email "Never Log" setting 🙂
We would like to see a way to log meetings to CRM from your Outlook calendar. Our sales team heavily uses Outlook and rather than track meetings in HubSpot manually by entering them individually, it would be awesome to have a log meeting to CRM button that would do it automatically!