Created by Claude - please verify

Retained mailboxes - soft-deleted mailboxes are purged 30 days after deletion unless a hold makes them inactive.

Required Microsoft Graph permissions

Exchange.ManageAsApp — application permission, granted to the app registration with admin consent.

Endpoints: Get-Mailbox -InactiveMailboxOnly · Get-Mailbox -SoftDeletedMailbox

If a permission is missing, this report shows a red load error with the Graph status code — not an empty table.

Inactive & Soft-deleted Mailboxes

When a user is deleted, their mailbox either becomes inactive (kept by a hold, for years, and still searchable in eDiscovery) or soft-deleted (recoverable for 30 days, then gone). This shows what the organisation still holds - and which mailboxes are about to disappear for good.