Step 1: Create a message, or for an existing message (Click Reply, Reply All, or Forward).
Step 2: In the message window, on the Message tab, in the Include group, click Attach Item.
Step 3: Click Outlook Item. Browse through your folder list to find the folder that contains the item that you want to attach. Under Items, click the item, and then click OK.
TIP: When composing a message, you can also attach files by using the commands on the Insert tab in the Include group, or drag files from folders on your computer and drop them on the message window
