This message could not be sent. Try sending the message again later, or contact your network administrator. Error is [0x80070005-00000000-00000000]

Question

Software: Microsoft Office 2007 Professional Plus
Service: Microsoft Office 365 - Cloud Hosted
Hello,
I have a user who receives this error when trying to send a calendar invite to her coworkers (names have been changed for privacy):
The following recipient(s) cannot be reached:
      Megan Bennis on 3/31/2014 3:43 PM
            This message could not be sent. Try sending the message again later, or contact your network administrator.  Error is [0x80070005-00000000-00000000].
      Charity Lurk on 3/31/2014 3:43 PM
            This message could not be sent. Try sending the message again later, or contact your network administrator.  Error is [0x80070005-00000000-00000000].
      Susan Parker on 3/31/2014 3:43 PM
            This message could not be sent. Try sending the message again later, or contact your network administrator.  Error is [0x80070005-00000000-00000000].
All three of these users are in her address book, and are all in her office residing on the same Office 365 domain account.
I have tried the troubleshooting methods outlined in this article, but they did not resolve the issue: http://theitbros.com/office-365-this-message-could-not-be-sent-try-sending-the-message-again-later/
- This entailed manually downloading/updating  the address book via 'Send/Receive --> Download Address Book...'. The second method in that article had me rename/move/delete the Address Book files stored on the local machine, and then allow them to
repopulate when you open Outlook again. This also did not resolve my issue.
Any ideas? Thanks in advance!

Answer 1

That's the kind of message you will see when trying to send on behalf of/send as another user, when you don't have the necessary permissions added. Or you are using the wrong send method, or using an outdated name cache entry, or the OAB is outdated.