You can't create a new admin audit log search because the arbitration mailbox 'SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}' ...

You can't create a new admin audit log search because the arbitration mailbox 'SystemMailbox{{e0dc1c29-89c3-4034-b678-e6c29d823ed9}}' for the organization '{0}' is located on a server that doesn't have Exchange Server 2010 SP1 installed. The mailbox must be moved to an Exchange 2010 SP1 server before you can create a new admin audit log search.