We have a Hybrid Exchange setup with Exchange Online (v15 tenant) and Exchange 2010 on premise.
The hybrid configuration for the most part is working, what I am having an issue with is getting on premise public folders to show up for cloud exchange users.
I followed the official documentation here (http://technet.microsoft.com/en-us/library/dn249373(v=exchg.150).aspx) and it kind of works.
When I am accessing Outlook on a public wifi I am able to login to Outlook as the cloud user and retrieve the cloud live/archive mailboxand on premise public folders show up in Outlook.
When I am accessing email via Outlook as a cloud user on the same LAN as the on premise exchange, the cloud user makes the connection for live/archive/active-directory mailbox but fails to create a proxy connection for the on premise public folders.
The error I get is a...