In Exchange 2013 you have the ability to add additional alias addresses to a mailbox. A user might ask you to create another alias perhaps with a shorter name and surname. This can be done from the Exchange Admin Center and the Exchange Management Shell.

Add an alias using the Exchange Admin Center:

• Step 1 -> Click on Recipients on the left.
• Step 2 -> Click on Mailboxes on the top left.
• Step 3 -> Click on the mailbox where you want to add an alias to.

Once you have located the mailbox you can double click it or click on the pencil.

• Once the properties for the user mailbox show, click on email address on the left.
• Now click on the + button as shown above to create an alias address.

• In this exercise we are going to use SMTP. That is the default radio button, no need to change it.
• Step 2 -> Enter in the alias email address.
• Step 3-> Click on OK.

• As shown above, the email alias we created in the previous step now shows as one of the SMTP addresses for the user.
• Click the save button.

Add an alias using the Exchange Management Shell:

• Set-Mailbox “Test_User2″ -EmailAddresses @{add=”[email protected]”}

Hope it helps.