Select Inbox on the left-hand side of the screen.
Select the messages.
To select all messages on the page: check the checkbox next to 'Recipients'.
To select specific messages: check the checkbox next to specific messages.
Select Archive in the upper-right corner of the screen.
Select Yes on the pop-up message.
Note: Only Messages in your Inbox and Alerts can be archived. Archiving on your end will not archive the Message for other recipients.