<div>
Hi,<br />
<br />
In order to access to Public Folder in Exchange on premise. The mailbox Office 365 must be linked to an on-premises user account.<br />
<br />
Do you have the mailbox online linked to an on premise account?<br />
<br />
Cheers
</div>


Hi,

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?

Cheers

<div>
The online user mailbox &quot;Staff.One&quot; has an OnPremise Remote Mailbox account.<br />
<br />
<a href="https://filedb.experts-exchange.com/incoming/2017/11_w48/1213293/Online_User_Object.PNG" target="_blank" title="Exchange Online User Object (7 KB)"><img alt="Exchange Online User Object" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2017/11_w48/800_1213293/Online_User_Object.PNG" /></a><br />
<a href="https://filedb.experts-exchange.com/incoming/2017/11_w48/1213294/OnPrem-GUI_User_Object.PNG" target="_blank" title="Exchange OnPrem User Object (GUI) (3 KB)"><img alt="Exchange OnPrem User Object (GUI)" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2017/11_w48/800_1213294/OnPrem-GUI_User_Object.PNG" /></a><br />
<a href="https://filedb.experts-exchange.com/incoming/2017/11_w48/1213295/OnPrem-Cmd_User_Object.PNG" target="_blank" title="Exchange OnPrem User Object (Cmd) (11 KB)"><img alt="Exchange OnPrem User Object (Cmd)" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2017/11_w48/800_1213295/OnPrem-Cmd_User_Object.PNG" /></a>
</div>


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

Exchange Online User Objecthttps://filedb.experts-exchange.com/incoming/2017/11_w48/1213293/Online_User_Object.PNG
Exchange OnPrem User Object (GUI)https://filedb.experts-exchange.com/incoming/2017/11_w48/1213294/OnPrem-GUI_User_Object.PNG
Exchange OnPrem User Object (Cmd)https://filedb.experts-exchange.com/incoming/2017/11_w48/1213295/OnPrem-Cmd_User_Object.PNG

Online_User_Object.PNG

OnPrem-GUI_User_Object.PNG

OnPrem-Cmd_User_Object.PNG

<div>
I found the answer with the assistance of others in a different forum.
</div>


I found the answer with the assistance of others in a different forum.

<div>
<div class="content wysiwyg-content">
I followed the process here:<br />
<br />
<a href="https://technet.microsoft.com/en-us/library/dn249373%28v=exchg.160%29.aspx?f=255&MSPPError=-2147217396" rel="ugc">https://technet.microsoft.com/en-us/library/dn249373%28v=exchg.160%29.aspx?f=255&MSPPError=-2147217396</a><br />
<br />
At the end there is an Important note about an exchange online user getting this error (which I am getting):<br />
<br />
Cannot expand the folder. The set of folders cannot be opened.<br />
Network problems are preventing connection to Microsoft Exchange.<br />
<br />
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).<br />
<br />
Any troubleshooting suggestions?
</div>
</div>


I followed the process here:

https://technet.microsoft.com/en-us/library/dn249373%28v=exchg.160%29.aspx?f=255&MSPPError=-2147217396

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?

Exchange Online User No Access To OnPremise Public Folders

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.