If you're doing a cross-forest migration including moving mailboxes make sure you migrate the SID History as well Check the guide Xiu provided and the official ADMT documentation http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=19188 Jonas Andersson | Microsoft Community Contributor Award 2011 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82

As far as my experience is concern I never had any issues with ADMT Tool, Never ever :) You just need to make sure that you check the AD health in both the forest. Cheers, Gulab | MCITP: Exchange 2010-2007 | Skype: Gulab.Mallah | Blog: www.ExchangeRanger.Blogspot.com

Good morning folks, I'm about to start a Active Directory consolidation, taking seven Windows Server 2003 Active Directories to a single Windows Server 2008 R2 Active Directory and will be using ADMT v3.0. I've tested and lab'd the migration roll-forward/back process and all looks straight forward so I think things should work reasonably OK however, I'm looking for advice/comments/experience from anyone who has 'real world' experience of using ADMT v3.0 for Active Directory consolidations/migrations. Any comments, observations, gotcha's would be very welcome as although I think I've got every angle covered it's always good to have comments/gotcha's from people who have done this already. Thanks in advance. FMcFF

In case you have Exchange in the environment, have a look at the article below: Exchange 2010 Cross-Forest Migration Step by Step Guide – Part I http://blogs.technet.com/b/meamcs/archive/2011/06/10/exchange-2010-cross-forest-migration-step-by-step-guide-part-i.aspx

Hello Mac, Is there anything specific thing you are looking for? Cause you already tested it in the LAB and everything is straight forward.Gulab | MCITP: Exchange 2010-2007 | Skype: Gulab.Mallah | Blog: www.ExchangeRanger.Blogspot.com

No not really....just any advice (gotcha's) to look out for when doing it in the 'real world'....