AOL Inbox on Outlook for Mac stopped working
Summary: I use an aol.com email address for personal email. All of a sudden--literally--the Inbox on Outlook for Mac (desktop) STOPPED showing new mail on July 25. Outbound mail is fine. The mail is working fine on my iPhone.
Details: I happened to note when on my MacPro (Outlook 2011/Yosemite) that there was nothing in my Inbox past July 25. All the mail is coming into the phone (either with the Outlook iOS, or AppleMail) just fine. Outbound not affected. This morning, at a remote location, I fired up my MacBook-Pro (Outlook 2016/High Sierra) and it did go and fetch all the mail--but once it did that on the first startup, no more mail came in. So, the situation is across two computers, two different softwares, and two operating systems. If I check my mail using the iPhone, or webmail at aol.com, all is there and fine--but Outlook on the desktop has stopped showing me the Inbox.
Help...
PS. Settings are the only ones I've seen for AOL across many sources. Incoming mail server is imap.aol.com at port 993, using SSL. Outbound is smtp.aol.com using port 587. I had no reason to change anything on either computer, but it all started this on July 25 with no changes on my end.
Mac Pro, OS X Yosemite (10.10.1), MacPro 5,1 16GB RAM; 256 SSD; 2 x 1TB HD