we have 3 domains on our exchange 2007 1. @abccorp.com (default) 2. @xyzcorp.com 3. @klmcorp.com We have added a new one 4. @klmcorp.co.kg we have exactly 42 users having "@klmcorp.com" & we need to change their primary email addressed of these 42 users to "@klmcorp.co.kg" Can I do this automated or must i go to every user & add this manually? please advise. Thank You Philip

You should do this with a new E-Mail Address Policy. Managing E-Mail Address Policies in Exchange Server 2007 http://www.msexchange.org/articles_tutorials/exchange-server-2007/management-administration/managing-email-address-policies.htmlMCTS: Messaging | MCSE: S+M

Hi Philip, You also can refer to this article: https://support.soundenterprises.net/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=183&nav=0,2,3 Hope it can help you. Best Regards!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.