<div>
Please add the error attachment. We do not see one attached.<br />
<br />
Also are u running the command from O365 power-shell and are u connected using global admin credentials. Do you have full access on the mailbox.
</div>


Sirec

<div>
It seems to work just fine for me for shared mailboxes, do attach the error you're getting. Alternatively, you can always use EWS to remove/cancel the meetings, here's a sample code: <a href="https://www.reddit.com/r/PowerShell/comments/7zqd2f/using_ews_and_powershell_to_cancel_meetings_in/" rel="ugc">https://www.reddit.com/r/PowerShell/comments/7zqd2f/using_ews_and_powershell_to_cancel_meetings_in/</a>
</div>


<div>
Thanks, I have the error attached now to better understand my issue.<br />
<br />
I am using a global administrator account to login. I should have full access to the mailbox as I have made changes to it through ECP in Exchange Online .
</div>


<div>
Interesting, it's failing with MapiExceptionSendAsDenied error, suggesting that you need to have Send As permissions on the mailbox. I will ping few Microsoft folks about this, afaik you dont need any additional permissions on the mailbox in order to run this cmdlet.<br />
<br />
If you are in a hurry, I guess you can try adding Send As permissions and rerun the cmdlet.
</div>


<div>
Tried with setting Send As permissions to the account and still no luck - i look forward to any other information that you find out
</div>


<div>
<div class="content wysiwyg-content">
I am trying to delete an Office 365 user's calendar appointments in bulk using Powershell. This account was turned into a shared mailbox earlier this year.<br />
<br />
I have tried the following command: Remove-CalendarEvents -Identity &lt;MailboxIdParameter&gt; -CancelOrganizedMeetings<br />
And it produces the error attached in the text file.<br />
<br />
I have also tried specifying the date and time range of cancellation/removal with no positive effect.<br />
<br />
Could it be as obvious as turning it back into a normal mailbox?<br />
<a href="https://filedb.experts-exchange.com/incoming/2018/11_w45/1400505/Calendar-bulk-delete-error.txt" target="_blank" class="file-inline" title="Calendar-bulk-delete-error.txt (3 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>Calendar-bulk-delete-error.txt</a>
</div>
</div>


Calendar-bulk-delete-error.txt

I am trying to delete an Office 365 user's calendar appointments in bulk using Powershell. This account was turned into a shared mailbox earlier this year.

I have tried the following command: Remove-CalendarEvents -Identity <MailboxIdParameter> -CancelOrganizedMeetings
And it produces the error attached in the text file.

I have also tried specifying the date and time range of cancellation/removal with no positive effect.

Could it be as obvious as turning it back into a normal mailbox?

Unable to run calendar appointment deletion command

Windows PowerShell is a task automation and configuration management framework from Microsoft, consisting of a command-line shell and associated scripting language built on the .NET Framework. PowerShell provides full access to the Component Object Model (COM) and Windows Management Instrumentation (WMI), enabling administrators to perform administrative tasks on both local and remote Windows systems as well as WS-Management and Common Information Model (CIM) enabling management of remote Linux systems and network devices.

Powershell

Microsoft Office is an integrated suite of applications that includes Outlook, Word, Excel, Access, PowerPoint, Visio and InfoPath, along with a number of tools to assist in making the individual components work together. Coding within and between the projects is done in Visual Basic for Applications, known as VBA.

Microsoft Office

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.

Exchange

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

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.