I have been tasked to export all mailboxes on an Exchange 2010 environment to pst. The reason for this is to provide Mimecast with the mailbox data to ingest into the clients archive that is hosted within Mimecast. We enable journaling on Exchange but need to ingest all mail that was sent and received before journaling was switched on. Note that you need to have Exchange 2010 SP1 installed to run the below. The mailbox export request is processed by the CAS server role. The path to the folder that you export to needs to be an UNC path, pointing to shared local folders won’t work. Make sure you have…