Here are the steps to perform in Microsoft Outlook, to add a Shared Mailbox email address to your From field:
	- Select the New Email button to start composing a new message
	
		- If necessary, select the Pop Out button in the upper right, to get the new email in its own separate window
 
	
	 
	- Select the Options tab in the top ribbon
 
	- Select the From button, to show the From field
 
	- Select the From dropdown, next to the Send button
 
	- Select Other Email Address... at the bottom of the dropdown
 
	
In the Send From Other Email Address pop-up, select the From... button 
	- Search the Address Book for the Shared Mailbox address you wish to send From
	
		- If the Address does not appear in the Address Book, you cannot send messages From that address
 
	
	 
	- Select the address, and click OK
 
	- Click OK on the Send From Other Email Address pop-up
 
	- The address you wish to send from should now be in the From box in the email composition window. From now on, the From drop-down will be visible, and you can choose which address to send From for each message.