The item can’t be opened because it’s become corrupted.
The entire report is listed below: Show Report
Microsoft Exchange is caching older content in Internet Information Services which supports the Outlook Web App.
Do one of the following to repair the mailbox:
Repair the mailbox using PowerShell:
Start a PowerShell session, and then type the following:
New-MailboxRepairRequest -Mailbox @domain.com -CorruptionType
SearchFolder,AggregateCounts,ProvisionedFolder,FolderView
Use the Windows Event Viewer to find the following EventIDs and verify that the job completes successfully:
Event ID 10047: A mailbox-level repair request started.
Event ID 10048: The mailbox or database repair request completed successfully.
Repair the mailbox using Exchange Management Console utility:
Open the Exchange Management Console and then delete the user that has the corrupt calendar.
Create the user again.
Open Backup Exec and use the Restore Wizard to perform a granular restore of the mailbox.
Ensure to not select the Recreate user accounts and mailboxes if they do not already exist on the destination server option.
Repair the mailbox using Microsoft Exchange Server Messaging API (MFCMAPI) tool:
Run MFCMAPI.
On the Session menu, click Logon, and then Display Store Table.
Select the user's mailbox in the table.
Expand the Root Container, and then expand Top of Information Store.
Right-click the Calendar, and the select Open Associated Contents Table.
Delete IPM.Configuration.CategoryList and IPM.Configuration.WorkHours.
Log on to Outlook Web App and verify that the calendar is not corrupted.