Outlook defaults to "File" tab

This is an odd one :-)

Every time I open a message in Outlook, it defaults to the "File" tab, as opposed to the "Message" tab. If I do something with it, eg add a category, it reverts back to the "File" tab again.

This doesn't sound much, but means that everything I do takes 2-3 clicks, rather than just one. With a lot of emails, this becomes a real chore!

Any suggestions?

Thanks,


Miles