Shared Mailbox, Forgotten OneDrive: The Offboarding Trap
John Smith uses john.smith@m365wizard.com for purchasing. It works while John is in the role, so nobody stops to create procurement@m365wizard.com. john.smith@m365wizard.com belongs to John, while the purchasing process belongs to the organization.
That distinction becomes visible when John leaves. The organization converts his mailbox to a shared mailbox and removes the license to save money. The email remains available, but the personal OneDrive does not become part of the shared mailbox. It remains a separate Microsoft 365 object.
This is usually a process problem before it is a mailbox problem. If a process belongs to the organization, give it a shared identity from the beginning.
