I have a user with 2 MS exchange 2010 accounts (Both on the same server but wanted them separate to be able to send emails from another account) Anyway i keep rebuilding his profile but after a while the same thing happens. He has many folders and sub folders but sometimes he just logs into his outlook and some of his folders either don't show up or the emails under it are missing. Not sure how to fix the issue. Sometimes when you do send and receive it comes up with a error about not being able to access his ost file. It is just the one user i have 7 more setup just like him in the office but his is the only one having the issue. I found a article about uninstalling a sept 2013 update from his pc but he doesnt have it. I need a way to fix this once and for all user is getting frustrated.