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The &quot;share&quot; button might be grayed out if you have more than one Calendar selected, depending on the Calendar type. Try this:<br />
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Go to OWA -&gt; Calendar. Press the little &quot;+&quot; signs to add the shared Calendar. Once added, right-click on it, select Share.<br />
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In addition, this might be blocked by sharing policies in your company. Check here for more info: <a href="http://technet.microsoft.com/en-us/library/jj657460(v=exchg.150).aspx" rel="ugc nofollow">http://technet.microsoft.com/en-us/library/jj657460(v=exchg.150).aspx</a>
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Excellent this worked like a charm!!
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I created a Shared Inbox through the Exchange Admin Center in O365. Anyone I've set to &quot;Full Access&quot; permission can open the calendar of the Shared Inbox no problem. Also sending appointments to the mailboxes address is working. The problem is even though we've set Full Access permission the calendar cannot be shared out to other users. The &quot;share&quot; button is grayed out in Outlook as well as the OWA. Am i even going about this the correct way? Should i be using Public folders instead?
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I created a Shared Inbox through the Exchange Admin Center in O365. Anyone I've set to "Full Access" permission can open the calendar of the Shared Inbox no problem. Also sending appointments to the mailboxes address is working. The problem is even though we've set Full Access permission the calendar cannot be shared out to other users. The "share" button is grayed out in Outlook as well as the OWA. Am i even going about this the correct way? Should i be using Public folders instead?

Share calendar from shared inbox

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.

Microsoft 365

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.