Hi there Peter H,
Welcome to Microsoft Community
I'm Bobadoye and I'd be happy to help you out with your question.
Apologies for the inconvenience, please try to clear your browser cache and cookies, use private/incognito browser or you consider using another browser to access your Outlook and see if it makes a difference.
I hope this information helps. If you have any questions, please let me know and I'll be glad to assist you further.
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Best Regards,
Bobadoye