We will be performing service restarts (mainly, information store) on LOUIE mailbox servers to force AD permission replication. Users may experience a momentary disconnect from Outlook or Mailbox Unavailable errors in OWA. Service is expected to be fully restored by 9:45 PM Eastern
Update 9:27 PM Eastern: Service has been restored to customers on LOUIE. Users may continue to see temporary errors as all users reconnect, however, as traffic reconnects, service will go back up to speed.