Exchange Server 2013 Cumulative Update 6 (CU6)was already released and provides several important updates for modern Public Folders. This blog post introduces you to the updates delivered in CU6 and discusses our on-going investments in public folders.
The FIRST improvement is : 10x Increase in Public Folder Limits. Did this get your attention ? Cool :)
So, to read all the details about the changes we have implemented, please browse to this link, where you will see all the new stuff described :