I just updated to 10.9.1 and now the mails in the subfolder of an exchange account are not shown anymore. They are stil available on the iphone and the sever, but the subfolders in apple mail are empty. I already re-installed the account, but it didn't work. Mails in the highest folder level (or inbox) are still there. Furthermore, If I check the account information, it counts the right number of mails.
Any ideas how I can fix this? Best would be to undo the update. Really anyoing if something doesn't work anymore after an update...