Hi, 

One of our users is experiencing an issue with the Outlook 2013. 

There's a meeting (Lync meeting to be exact) that has shown up, as he says, by itself, and is not possible to be removed.
We have tried to remove it from outlook web app, from outlook 2013 calendar too. 

Still not possible. 

While removing of course we've used "remove the series" but the meeting quantity doesn't change. 

As we try to remove it, the meeting keeps poping out.

User is using Mac computer and we've checked this on Windows machine.

Could you please help us?
That is pretty urgent as it blocks customer calendar from use. 

Thanks in advance. 

Hi Dean,

Appears that the Calendar item is corrupted.

1. Please try running mailbox repair on the mailbox

New-MailboxRepairRequest -Mailbox tony@contoso.com

2. Use MFCMAPI with caution to identify and delete the corrupted item.

3. Enable or Disable Calendar Repair for a Mailbox - Valid for Ex2010, not sure if works for 2013.

Hi,

Please check the meeting organizer for this item. Then contact the meeting organizer to cancel the meeting and check whether the items can be removed from Calendar.

If the meeting is created by the problematic user himself\herself, please close Outlook and delete the meeting by using OWA. If it cant be deleted in OWA, please note the error message.

If it cant be deleted in OWA, please check whether you can edit the Calendar item in Outlook then delete it from Calendar. In Outlook, delete all items that are in the Deleted Items folder, and then try to delete the meeting request or message. For more information about other methods, please refer to:

https://support.microsoft.com/en-us/kb/2503266

Additionally, please check whether there is any third-party device used for Calendar syncing and the problematic meeting was created by using this device. If that is the case, please delete the meeting from the device and disable the device to check whether the meeting is removed in Outlook or not.

Regards,