Exchange Setup fails on "Discovery Mailbox"

Disable-Mailbox “DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}”

Enable-Mailbox “DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}” -Arbitration

Add-MailboxPermission -Identity:”stwater.intral/Users/DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}” -User:”Discovery Management” -AccessRights:”FullAccess”