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I keep running into this problem, and going around trying to fix it, then eventually it does fix itself so Im assuming its a waiting game, but thought Id ask.<br />
<br />
When I create a shared mailbox through the O365 portal, I add the user I want to be able to access it as a 'member' then I go over into Outlook and go:-<br />
&nbsp; &nbsp; &nbsp;File / Account Settings / Account Settings / Click on the O365 account / More Settings / Advanced / Add Mailbox<br />
The mailbox shows find, but when I try to expand I get:-<br />

<blockquote>
Cannot expand the folder.
</blockquote>
<br />
Seems if I wait a few hours it eventually works, however it really is doing my head in at the moment, and wanted to know if it is just a case of waiting, or if there is another issue.<br />
<br />
Thank you
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I keep running into this problem, and going around trying to fix it, then eventually it does fix itself so Im assuming its a waiting game, but thought Id ask.

When I create a shared mailbox through the O365 portal, I add the user I want to be able to access it as a 'member' then I go over into Outlook and go:-
     File / Account Settings / Account Settings / Click on the O365 account / More Settings / Advanced / Add Mailbox
The mailbox shows find, but when I try to expand I get:-
Cannot expand the folder.

Seems if I wait a few hours it eventually works, however it really is doing my head in at the moment, and wanted to know if it is just a case of waiting, or if there is another issue.

Thank you

O365 Shared Mailbox - cannot expand the folder

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.