It fixed my Outlook problem! Hi, Just to let you know what I end up with to solve the slow outlook synchronization issues. Thank you, Popowich, for your excellent instructions. Last edited by a moderator: Jan 19, Joined: Nov 7, Messages: 1 Likes Received: 0. This way, I will be notified of new emails faster, and then selectively download the body of new emails. 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'. I have to click on a subfolder to check for new emails in it. 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. Hi popowich, I am using the outlook auto filter tool, which moves new emails into subfolders. Joined: Aug 22, Messages: 2 Likes Received: 0. Nirav DFeb 11, Joined: Jul 4, Messages: 1 Likes Received: 0. What difference does it make if we leave it checked or unchecked? But I appreciate if u can actually explain the logic. Joined: Aug 12, Messages: 8, Likes Received: Last edited: May 8, Joined: Dec 13, Messages: 20 Likes Received: 0. Discussion in ' Microsoft Outlook ' started by popowichMay 31, Log in or Sign up.