Posts Tagged ‘exchange mailbox validation failed’

Recently trying to install the Mimecast mimecast synchronization engine on an Server with Exchange 2013 Machine , since Exchange 2013 ,

  1. Made sure impersonation was setup https://community.mimecast.com/docs/DOC-1734
  2. Made sure OWA was working with the Mailbox

Error exchange mailbox validation failed, code: MailboxUnreacheable

EWS restricts you running API requests locally by default.

Try running this software from another machine

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