SELECT LastAccessed,MailboxOwnerUPN,LogonUserDisplayName,Operation,OperationResult,ClientInfoString,ItemSubject
FROM OpenExchangePSQuery(
    POWERSHELL, '
        Search-MailboxAuditLog -LogonTypes Delegate -ShowDetails | Select LastAccessed,MailboxOwnerUPN,LogonUserDisplayName,Operation,OperationResult,ClientInfoString,ItemSubject
              ', POWERSHELL
)