We are making it easier to move your existing public folders to Exchange Online modern Public Folders. We are introducing 2 improvements to make this migration easier – first we have increased the ...
Updated Jul 01, 2019
Version 2.0
Blog Post
In have a question about public folders and Exchange online on an issue which is not actually referenced in this article. We are currently planning a gradual migration from our on-premise Exchange 2010 installation to Office 365. This will involve a fairly
long Hybrid stage during which our migrated users will require access to the on-premise PFs. I have read
http://technet.microsoft.com/en-us/library/dn249373%28v=exchg.150%29.aspx
technet.microsoft.com/.../dn249373%28v=exchg.150%29.aspx and this seems to be achievable. However, one question troubles me. All our on-premise mailbox servers, including those with PF replicas are on a private network and are not visible from the internet.
Hence even when we add the CAS role to these servers, Exchange Online will not be able to get directly to them. We will also be installing a couple of Exchange 2013 coexistence servers into our on-premise environment. Will this be enough to allow PF access,
or will we also need to publish the mailbox servers via something like TMG?