Using older versions of Outlook for Mac for personal email and calendar
Hello, I’m Virginia a fellow Outlook user.
Have you tried deleting the account & adding it again?
Is the app/program running the latest version? How old is the app/program?
Is the Mac OS up to date/running the latest version? How old is the Mac?
Please check the suggestions here for that error message:
https://www.macuncle.com/blog/fix-outlook-for-mac-error-code-17193/
Check the webmail version of Outlook to see if anything is showing in the outbox which hasn’t synced to the app.
If clearing the cache doesn’t help then try checking the disk for errors or try uninstalling & reinstalling the Outlook app.
I would try adding the account to the default/inbuilt email app to see if the problem occurs there too, if an email shows then are you using any adblocker &/or VPN which may be interfering with sync?
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products).
Please do not download any repair tool which may be offered by this site other than the ones I mention/recommend.
Thoroughly research any product which is mentioned here before you decide to download and install it.