"Office365" menu item is visible under Reseller CP.
Software-related issue #APSA-16558: "Office 365 tab is shown under Reseller".
Contact your Technical Account Manager or Pooled Technical Associates team to trace the status of the issue.
Workaround: uncheck the
System > Settings > System Properties > APS placeholders in provider panel item.
In this case "Office365" menu item disappears from both PCP and RCP but, provider can access Office365 instance properties by
Services > Applications > Office365 still.