We are happy to reveal that we’re increasing the number of public folder mailboxes in Exchange from 100 to 1,000. More Public Folder mailboxes means more storage space capacity for public folders. ...
Updated Jul 01, 2019
Version 2.0
Blog Post
@Thomas Stensitzki - As the article states this is available in Exchange Online and only coming to Exchange 2016 via CU2.
Ross