Previous session covered retention tags and retention policies.
Litigation Hold
Definition: Used to preserve the entire mailbox or contents of a mailbox.
User Experience:
Deleted emails go to the Deleted Items folder (30 days).
If not recovered within 30 days, they move to the Deletions folder (14 days).
After 14 days, emails are purged and cannot be recovered by users or administrators if purged.
Enabling Litigation Hold
If litigation hold is enabled (e.g., duration = 1 year):
Deleted emails will still move to Deleted Items and Deletions as usual.
If an email is purged, it moves to a Purges folder within the Recoverable Items folder and is preserved for the litigation hold duration (1 year).
Administrators can recover purged emails using the e-discovery tool or content search.
Preservation of Mailbox
Litigation hold can preserve entire mailboxes even if deleted by an administrator.
If an admin deletes a mailbox:
Mailbox goes to soft-deleted state for 30 days.
If the user account is purged, mailbox moves to inactive mailbox state for the duration of litigation hold (e.g., 1 year).
Admin can recover the mailbox using PowerShell, content search, or e-discovery tools.
Retention Hold
Definition: Prevents deletion of items within a mailbox for a specified time.
Scenario:
A user on leave may receive emails, but if a retention policy is in place to delete emails older than 7 days, those emails would be permanently deleted.
Retention Hold Functionality:
When enabled, the Managed Folder Assistant will bypass mailbox processing, meaning retention policies will not take action while retention hold is active.
Managing Retention Hold
PowerShell Only: Retention hold can only be managed via PowerShell commands.