Exchange Online User No Access To OnPremise Public Folders

I followed the process here:

At the end there is an Important note about an exchange online user getting this error (which I am getting):

Cannot expand the folder. The set of folders cannot be opened.
Network problems are preventing connection to Microsoft Exchange.

I moved a mailbox from On-Premise to the cloud, which left a 'Remote User Mailbox' object behind, so the user has an exchange object On-Premise. I tried deleting that object and created a MailUser object instead, but I still had the same issue (I since changed it back).

Any troubleshooting suggestions?
Who is Participating?
byt3Connect With a Mentor Author Commented:
I had this issue posted in the technet forums as well, where with the help of members there, I was able to resolve the issue.
viktor grantExchange ServersCommented:

In order to access to Public Folder in Exchange on premise. The mailbox Office 365 must be linked to an on-premises user account.

Do you have the mailbox online linked to an on premise account?

byt3Author Commented:
The online user mailbox "Staff.One" has an OnPremise Remote Mailbox account.

Exchange Online User Object
Exchange OnPrem User Object (GUI)
Exchange OnPrem User Object (Cmd)
byt3Author Commented:
I found the answer with the assistance of others in a different forum.
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