Documentation forServer & Application Monitor

Microsoft Office 365 Exchange Mailboxes

This template shows information about Office 365 Exchange mailboxes and includes the following Component Monitors:

  • Inactive Exchange Users
  • Mailbox Sizes (largest mailboxes)
  • Mailboxes over Quota
  • Mailbox Sizes (Shared)
  • Archived Mailboxes
  • Forwarded Exchange Users


WMI access to the target server

See also Connect to Exchange Online Using Remote PowerShell (© 2020, Microsoft Corp, available at, obtained on February 3, 2020)

Run the PowerShell script mentioned in the Microsoft article on the Orion server, not the target node.


  • An Orion account with SAM administrator permissions.
  • An Office 365 account with Global Administrator privileges.
    An alternative account with an admin role can be used if it meets the following requirements.
    • The account must be a member of an Office 365 admin role.
    • The account has adequate rights to subscriptions and management groups, as well as access to the Office 365 API.
    • The account should be an all-in-one, inclusive account to support the monitoring of all mailboxes.

Use UPN format (username@domain) — not domain\username format to enter credentials. Also, a service account for Exchange Web Services is recommended to avoid authentication issues when passwords are updated.