I've run into an issue when copying events from one calendar to another within Exchange. I've migrated a client over from an Exchange 2007 to an Exchange 2010 SP2 server. Everything went smoothly, except for calendar events. After copying the user / room calendars over, I've noticed that the events created pre-migration retain some permission from the previous accounts. Users cannot edit these events or send out invitations to the events. They receive a message saying they lack the proper permissions.
Any advice as to how I can copy these events without copying the permissions?