http://office.microsoft.com/en-us/outlook-help/automatically-forward-my-messages-to-another-e-mail-account-HA010227668.aspx

http://email.about.com/od/outlooktips/qt/et_auto_cc.htm

Forwarding in Outlook is done with 'Rules'.

To copy all messages to another e-mail address, create a new rule like this:

Tools → Rules and Alerts → New Rule → for Arriving Messages

Give the new rule a name…something like 'Copy all messages to Fred', then select:

Forward the message to people or distribution list →

  Highlight Check messages after sending.
  Click Next >.
  Click Next > again to copy all mail you send.
      You can define any combination of criteria to copy only certain messages before clicking Next >. 
  If you specified no filtering criteria, click Yes.
  Make sure Cc the message to people or distribution list is checked under Step 1: Select action(s).
  Click people or distribution lists under Step 2: Edit the rule description.
  Double-click contacts or lists from your address book or type an email address under To ->.
      Separate multiple addresses with semicolons (;). 
  Click OK.
  Click Next >.
  Click Next > again.
  Precede the email address already entered under Step 1: Specify a name for this rule with "Cc: ".
  Click Finish.
  Click OK. 

Click on 'Out of Office Assistant'.

Note that Internet Explorer browser is require for full functionality.

In IE, browse to your Exchange server. With SBS, it's usually something like:

https://remote.yourdomain.com

1. Log in and select E-Mail.
2. Click on Options.
3. Select 'Rules' for forwarding.
4. Select 'Out of Office Assistant' for vacation messages.