Hi popowich,
I am using the outlook auto filter tool, which moves new emails into subfolders.
If I uncheck the "Get folder unread count for subscribed folders", yes outlook become faster to sync emails, but the problem with this is that outlook doesn't check for new emails in the subfolders any more. I have to click on a subfolder to check for new emails in it.
The better approach for me is:
tick "Get folder unread count for subscribed folders",
Under Received mail items check the option "Download headers for subscribed folders".
This way, I will be notified of new emails faster, and then selectively download the body of new emails.
I am still looking for better solutions.
Hope it helps.