We are trying to set up an e-mail address policy that sets the primary SMTP address as firstname.middleinitial.lastname@domain.com (this is complete). I want to make the secondary SMTP address based on the UPN which is the employee number. I am not having any luck finding this information anywhere. Is there an easy way to do this? Accounts/mailboxes are already created.

Email Address Policies cannot do this, as they are limited to the following customizations: Variable Value %g Given name (first name) %i Middle initial %s Surname (last name) %d Display name %m Exchange alias %xs Uses the first x letters of the surname. For example, if x = 2, the first two letters of the surname are used. %xg Uses the first x letters of the given name. For example, if x = 2, the first two letters of the given name are used. Src: http://technet.microsoft.com/en-us/library/bb232171.aspx You could however, use a script to manually stamp each of the users with this additional address. Mike Crowley | MVP My Blog -- Planet Technologies

Email Address Policies cannot do this, as they are limited to the following customizations: Variable Value %g Given name (first name) %i Middle initial %s Surname (last name) %d Display name %m Exchange alias %xs Uses the first x letters of the surname. For example, if x = 2, the first two letters of the surname are used. %xg Uses the first x letters of the given name. For example, if x = 2, the first two letters of the given name are used. Src: http://technet.microsoft.com/en-us/library/bb232171.aspx You could however, use a script to manually stamp each of the users with this additional address. Add Proxy Addresses to Many Users' Accounts with Windows PowerShell Mike Crowley | MVP My Blog -- Planet Technologies

Hi, Mike is right. You could aslo use this command to add the UPN as secondary Email address. $1=get-mailbox test $2=$1.UserPrinciPalName $1.EmailAddresses += ("SMTP: $2") Set-mailbox –identity test –EmailAddresses $1.EmailAddresses More information Add an E-Mail Address for a User Mailbox Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.