Using classic Outlook for Windows in business environments
OK, I moved about 21K files to three folders and because it was becoming unusable, decided to erase the OST on the old computer (but still the one I'm using), and CPU was moderate but it filled so that the inbox and those three folders matched the size in the web based AOL. Before that both were running constantly -- strangely the new PC with a much more powerful CUP with many more cores, was running higher and that version of windows listed outlook's use of power as very high. Dunno what it was doing but it didn't involve eithernet I/O.
Note that before that neither had dropped after moving about 15K emails out of the inbox. Yet it was also missing many.
Well it worked. And with lower CPU usage than when it was doing nothing. Gave me a scare when I noticed that it hadn't even started the sent messages, and then that started to grow. I left it in the sent messages, and looked back later and saw a lot less than was in the inbox, and thought, "now it's cycling", but then I noticed it was hte sent messages.
So I decided to try deleting the mailbox on the newer, faster computer. Worked there too, and the power usage never got beyond moderate.
BTW, my inbox is now sitting at a little over 38K.
We'll see if it keeps working.