Update: i was on the phone with Technical Support this morning and they are aware of the problem; HOWEVER they do not why it is occurring and recommended contacting Microsoft. I was told by the Cox technical engineer that It appears the issue is just with Outlook for Mac 2011 and not the later versions. One solution for 2011 is to delete the account and open a new one although they were not confident how long that would last. I ended up purchasing Office for Mac 2016 which includes Outlook, Word, Excel and Powerpoint for $79. Once prompted for my account particulars, Outlook automatically connected into Cox and my emails downloaded. The 2016 version for the server has IMAP/POP and automatically did its thing including picking the port values. So one approach is to upgrade. Take care though. I could not upgrade to 2019 SW since my MacBook has the El Capitan OS as the latest and last for my dated MacBook Pro and that can't support the latest Microsoft 2019 products. Good luck with whatever approach you choose.
Thanks for the update. I did the same and upgraded and now everything is back working.
