Details
You can use this setting to specify how long deleted mailboxes are retained before they are permanently removed from the database. Defining a reasonable retention period facilitates recovering accidentally deleted mailboxes while controlling the volume of storage that retained mailboxes require.
Rationale:
Administrators may want to recover accidentally deleted mailboxes or they may need to recover deliberately deleted mailboxes for legal or managerial reasons.
Solution
To implement the recommended state, execute the following PowerShell cmdlet:
Set-Mailboxdatabase ‘EXCHANGE01Mailbox Database’ -MailboxRetention 30.00:00:00
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: System and Information Integrity.This control applies to the following type of system Windows.