When you try to accept a meeting request on behalf of a Microsoft Exchange Server 2007 resource mailbox, you may receive one of the following error messages:
Error message 1
Cannot open Calendar folder for user resource_mailbox_name. The operation failed.
Error message 2
Cannot open the free/busy information. You do not have permission to create a subfolder in this folder.
Additionally, you cannot open items that are in the Calendar folder of the resource mailbox. When you try to open an item that is in the Calendar folder, you receive the following error message:
Cannot open this item. Cannot open the free/busy information. You do not have sufficient permission to perform this operation on this object. See the folder contact or your system administrator.
However, you can open the Calendar folder of the resource mailbox.
This issue occurs if the following conditions are true:
You are a delegate for the resource mailbox.
You have insufficient permissions to the resource mailbox.
If the delegate has insufficient permissions to the resource mailbox, the delegate cannot respond to meeting requests, nor can the delegate view calendar items. This situation can occur if an administrator used the -ResourceDelegates parameter of the Set-MailboxCalendarSettings shell command to set permissions on the resource mailbox.
To resolve this problem, use one of the following methods.
Method 1: Provide full mailbox access for the resource mailbox to the delegate
To provide full mailbox access for the resource mailbox to the delegate, follow these steps:
Click Start, point to All Programs, point to Microsoft Exchange Server 2007, and then click Exchange Management Shell.