Bharat
Fri May 18 19:25:38 CDT 2007
Exchange Organizations span an AD Forest. You can't really "move" Exchange
servers between Forests/Exchange Organizations. What you can do (longer
term) is migrate mailboxes of Forest B users to Forest A, and then (if
required) migrate users and computers.
Generally, what is done immediately in M&A situations:
1) Have a common email address (single domain) while keeping the older email
address (for at least one company, usually the one getting acquired -
they're the ones who need to change their addresses.. ) alive to receive new
mail and replies to the older address for some time... generally a few
months.
This is done by a) Creating/modifying Recipient Policy in Forest B to get
email addresses for Forest A's domain and setting it as the primary address.
(The old address now becomes secondary address, new messages get sent out as
primary address but users can receive as secondary address) b) Sharing SMTP
address space
How to share an SMTP address space in Exchange 2000 Server or in Exchange
Server 2003
http://support.microsoft.com/kb/321721
2) Be able to see each others' recipients in a "common" GAL (under the hood,
recipients from one Org are created as Contacts in the other Org, and vice
versa... you're still in 2 separate Exchange Orgs).
This is done using a tool like GALSync in MIIS Feature Pack 1a. Take a look
at:
a) Microsoft® Identity Integration Server 2003 Scenarios
http://www.microsoft.com/downloads/details.aspx?FamilyId=15032653-D78E-4D9D-9E48-6CF0AE0C369C&displaylang=en
b) Clustering MVP Rod Fournier has step-by-step instructions here:
GALSync Unleashed:
http://msmvps.com/blogs/clustering/archive/2004/10/06/15141.aspx
3) Be able to see each other's Free/Busy information for scheduling
meetings:
This is done by replicating the Free/Busy (system) Public Folders (and any
other Public Folders you want replicated) between the two Orgs using the
InterOrg Replication Tool.
Download:
http://www.microsoft.com/downloads/details.aspx?familyid=e7a951d7-1559-4f8f-b400-488b0c52430e&displaylang=en
Also take a look at:
Planning to Deploy Exchange in a Multiple Forest Environment
http://technet.microsoft.com/en-us/library/e477a729-e0d9-44e3-816c-f3fe39e6fa36.aspx
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
exchangepedia.com/blog
------------------------------
"Tom" <Tom@discussions.microsoft.com> wrote in message
news:00B75B7E-C319-42B0-BB97-9D4CF3E95ED1@microsoft.com...
> We have two seperate AD (both 2003) forests each with its own Exchange
> organization. We are planning setting a trust relationshib between both AD
> forestes. When we do this is it possible for us to move both Exchange 2003
> servers to a single organizaton? We would like to have a common GAL and
> also
> be able to route email as we will be changing email addresses so that both
> companies have email addresses will be @newcompany.com
> Thanks