Microsoft Exchange/Office365

Add or remove email addresses from a mailbox

You can use the EAC or the Shell to add or remove an email address for a user mailbox.
You can configure more than one email address for the same mailbox. The additional addresses are called proxy addresses. A proxy address lets a user receive email that’s sent to a different email address.
Any email message sent to the user’s proxy address is delivered to
their primary email address, which is also known as the primary SMTP address or the default reply address.

Decide if to include it:
Users can have primary and secondary proxy addresses. The primary proxy address for a user is the one used to send e-mail to the foreign system.
The secondary proxy addresses are used when e-mail is received from the foreign system. On outgoing messages, the primary proxy address is used as the address of the sender. On incoming messages, the recipient listed in the message is matched against the secondary proxy addresses in Active Directory to find the proper recipient object for the message.
Use the EAC to add an email address

In the EAC, navigate to Recipients > Mailboxes.
In the list of user mailboxes, click the mailbox that you want to add an email address to, and then click Edit Edit icon.
On the mailbox properties page, click Email Address.
On the Email Address page, the primary SMTP address is displayed in bold text in the address list, with the uppercase SMTP value in the Type column.
Click Add Add icon, and then click SMTP to add an SMTP email address to this mailbox.
SMTP is the default email address type. You can also add Exchange Unified Messaging (EUM) addresses or custom addresses to a mailbox. For more information, see “Change user mailbox properties” in the Manage user mailboxes topic.
Type the new SMTP address in the Email address box, and then click OK.
The new address is displayed in the list of email addresses for the selected mailbox.
Click Save to save the change.

Using the Shell to add an email address

The email addresses associated with a mailbox are contained in the EmailAddresses property for the mailbox. Because it can contain more than one email address, the EmailAddresses property is known as a multivalued property. The following examples show different ways to modify a multivalued property.
This example shows how to add an SMTP address to the mailbox of Dan Jump.
Set-Mailbox “Dan Jump” -EmailAddresses @{add=””}

This example shows how to add multiple SMTP addresses to a mailbox.
Set-Mailbox “Dan Jump” -EmailAddresses @{add=””,””}

For more information about how to use this method of adding and removing values for multivalued properties, see Modifying multivalued properties.
This example shows another way to add email addresses to a mailbox by specifying all addresses associated with the mailbox.

In this example, is the new email address that you want to add. The other two email addresses are existing addresses. The address with the case-sensitive qualifier SMTP is the primary SMTP address. You have to include all email addresses for the mailbox when you use this command syntax. If you don’t, the addresses specified in the command will overwrite the existing addresses.
Set-Mailbox “Dan Jump” -EmailAddresses,,
See link below to perform these three steps.
How do you know this worked?
Use the Shell to add email addresses to multiple mailboxes
Use the Shell to remove an email address.


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