1. In the Exchange Admin Center, navigate to Recipients > Mailboxes.

  2. In the list of user mailboxes, click or tap the mailbox that you want to set up mail forwarding for, and then click or tap Edit Edit icon.

  3. On the mailbox properties page, click Mailbox Features.

  4. Under Mail Flow, select View details to view or change the setting for forwarding email messages.

    On this page, you can set the maximum number of recipients that the user can send a message to. The recipient limit is unlimited by default. If you want to specify a limit, click the Maximum recipients check box and then type the limit in the text box beneath the check box.

  5. Check the Enable forwarding check box, and then click or tap Browse.

  6. On the Select Recipient page, select a user you want to forward all email to. Select the Deliver message to both forwarding address and mailbox check box if you want both the recipient and the forwarding email address to get copies of the emails sent. Click or tap OK, and then click or tap Save.