Office 365: Fatal error RecipientNotFoundPermanentException has occurred

In Office 365 administrators may experience almost immediate failures of migrations to Office 365.  The error is typically in the following format:   Error: Cannot find a recipient that has mailbox GUID ‘MAILBOX-GUID’.   The migration log shows the following information at the end of the log regarding the failure exception””:   9/11/2017 9:13:58 PM…

0

Office 365: Users have both a cloud and on premises mailbox.

In Office 365 our provisioning logic generally prevents the existence of a mailbox on premises and in the service.  You can imagine the confusion of cloud messages delivering to a mailbox in the cloud and on premises messages delivering to a mailbox on premises.   When a mailbox is provisioned on premises the azure active…

0