Thanks Grumpy9117 but that's not possible. It isn't an email I'm sending, it's about booking a meeting in the Calendar that I need to do and where you click Add Others to select all the people to be invited. As far as I know, the list of those invited is open for all to see but I've been asked to hide that information for a particular meeting. Don't think it's possible but thought I'd ask if anyone knew of a way.