Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi,
Do you want to reinstall Classic Outlook or New Outlook?
Classic Outlook
https://support.microsoft.com/en-us/outlook/install-or-reinstall-classic-outlook-on-a-windows-pc
New Outlook
https://apps.microsoft.com/detail/9NRX63209R7B?hl=en-us&gl=US&ocid=pdpshare
Can you download the application using the links above.
Please consider rating the question (accepting the answer or not) and visiting the Microsoft Q&A community if you have further questions.
Thanks.