I’ve been granted access to several large mailboxes and Public Folders which I’ve marked as Favorite. As I’m also regularly off-line, I’ve configured Outlook to also cache this shared content. However, the result is that I now have a really big ost-file.

I was hoping that with the Sync Slider feature in Outlook 2013, I was able to limit how much was being cached and reduce the size of the ost-file. I’ve set the Sync Slider now to 30 days and it seems to work on my own mailbox but it doesn’t have the same effect on my shared mailboxes and Public Folders.

Does the sync slider affect these shared folders at all? If not, what alternatives do I have to reduce the total size of my ost-file?