Hi Martyn, welcome and thank you for your question. My name is ***** ***** I am glad to assist you today.
I am very sorry about your issues. What version of MS Outlook are you using? 2007, 2010, 2013 or 2016?
Also, is your Outlook a standalone product? Or is it part of MS Office like MS Word, and Excel?
Please let me know by replying to me here so that I can help you further.
Wow, that is great. So it means that you have an active MS Office subscription and you might have bought the update for 2016.
Please click the link below and run/open the downloaded program
Yes, please check now if the issue is resolved.