Additional features, settings, or issues not covered by specific Microsoft Teams categories
Hi, @Tracey Edwards ,
Maybe you could check this setting In Teams as well, your Outlook might be interfering with the availability according to the calendar.
Teams could be set as the default conversation app in Outlook
In Teams, click on your User Account Icon, Click Settings. Un check the "Register Teams as the chat app for Office" checkbox. Restart Outlook, or machine if needed.