If you are facing difficulties or weird behavior using Microsoft Outlook, you may try to remove your current Outlook profile & re-configure your Outlook.
In doing so, this will also remove your profile specific settings such as rules or signatures.
- In your windows search box, search for "Control Panel".
- In the control panel, search for "Mail" in the search box.
- Click on "Show Profiles...".
- Choose your profile, & remove the selected profile.
To re-configure back your profile, please refer to below article, section 3.2
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Remember, when in doubt, use OWA.
https://exchange.metatechnology.co.uk/