When an Exchange user tries to forward an appointment created by a Notes user to another user he/she will get an error [0x80070005-00000000-00000000]. When doing the same with an appointment created in Exchange it works perfectly.
When a user attempts to forward a meeting invite from an external domain Notes in this instance, they receive a bounce as follows:
To resolve this issue, install the following cumulative update: CU3 for Exchange 2013
The full document can be found here: http://support.microsoft.com/kb/2902929/en-us
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