Retention policies are not automatically applied to end user mailboxes and must be set manually using either the Exchange Admin Center or the Exchange Management Shell. In this recipe, you'll learn how to apply retention policies to mailboxes from the command line, which will be useful when performing a retention policy assignment on a large number of mailboxes, or on a regular basis as new mailboxes are created.
To apply a retention policy to a mailbox, you use the
Set-Mailboxcmdlet, specifying the retention policy name using the-RetentionPolicyparameter. For example, to do this for one user, the command would look something like this:Set-Mailbox dsmith -RetentionPolicy AllUsersIn addition, you may need to perform this operation on all mailboxes at once. In this case, you could use the following syntax:
Get-Mailbox -RecipientTypeDetails UserMailbox | Set-Mailbox -RetentionPolicy AllUsers