What is a requirement for deleting an email mailbox in Garrison?

To delete an email mailbox in Garrison, it is necessary for the user to no longer be affiliated with the military. This requirement is in place because email accounts often contain sensitive data and are tied to the individual's status in the organization. Maintaining security protocols and ensuring that the email accounts are only accessible by current personnel helps to protect both the individual’s privacy and the integrity of the organization’s data.

The implication of this requirement is to prevent unauthorized access to the mailbox after the user has left the military, ensuring that any sensitive information is handled appropriately. Since military affiliations often come with specific responsibilities and access rights, the proper deactivation of accounts for departing personnel is critical to overall security and compliance within the organization. Other options may not align with this specific protocol regarding data security and regulations governing personnel changes.