Hi,

We have just changed our email service provider from Google to Exchange Online. Once in a while, some of my users are experiencing this error "This message could not be sent. Try sending the message again later, or contact your network administrator.  Error is [0x80070005-00000000-00000000]."

I have no idea what to do about it. The user is just sending emails to internal employees through the Offline Global Address List. It does not happen all the time. At least once a week there will be a user be complaining about this issue.

I hope somebody have a solution for this. It's kind of annoying. Thanks