This is the first time I've seen this happening with a Windows-based device. Basically I receive an email notification from Geekzone every time someone posts or update a posts. This reaches the Exchange server and is then moved to a folder.
On Outlook I read some messages and mark everything as read after a while.
Since yesterday I've noticed the read status is not being correctly synchronised between the Windows Phone device and the Exchange.
This only happened for me before with Android-based devices. I've used Exchange to Windows devices synchronisation since 2003 and never seen this - from Windows Mobile 2003 Pocket PC Phone Edition through Windows Mobile 5.0, Windows Mobile 6, Windows Mobile 6.5, Windows Phone 7, Windows Phone NoDo... But Windows Phone Mango is the first I've seen doing this.
Anyone having similar experiences?