Since upgrading to CU2 on Exchange 2013 several users have come back to me saying they get errors when trying to forward a calendar, here is the error:
This message could not be sent. Try sending the message again later, or contact your network administrator. Error is [0x80070005-00000000-00000000]
MS have advised this is a know bug and will be fixed in CU3. You can check if you get the same error on OWA as well. CU3 is scheduled to be released in about 3 months time.
I find that copying the actual content of the meeting request and then sending a new one works but for users that is a pain.
Hope it helps
Thanks for posting this Edward. Is there a Microsoft publication that lists this as a known issue, that I could possibly share with my clients?
It is posted on the Exchange Technet forums but this only started happening after CU2 was applied on Exchange 2013 as well as CU2v2. Some articles on the web indicated a bug but MS have not commented on Exchange 2013, with Office 365 the same issue occured and they provided a fix but we are waiting for CU3 to release to hopefully fix this.