Documentation forHybrid Cloud Observability Essentialsand Server & Application Monitor

Microsoft Office 365 Exchange Mailboxes

You can use this SAM application monitor template to monitor the following details about Office 365 Exchange mailboxes:

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

Tip: Consider using one of the new SAM API Poller templates designed for Microsoft 365 instead of legacy application monitor templates.


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 Platform account with SAM administrator permissions.
  • An all-in-one, inclusive Office 365 account with Global Administrator privileges to support the monitoring of all mailboxes.

    Alternatively, use an account with an admin role that has permission to access data to be monitored via the Office 365 API.

  • Use UPN format (username@domain) — not domain\username format to enter credentials.

    To avoid authentication issues if passwords change, use a service account for Exchange Web Services.