View another Exchange domain calendars

we have two domains since our company joined with another years ago.
We have two exchange environments.

I am currently in the process of moving one user at a time to the new exchange environment.

Is there a way to give the users in the old environment visability of the calendars in the new one?

We have excahgne 2007 and the new one is 2003 and 2010

thank you
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MaheshConnect With a Mentor ArchitectCommented:
You can use Microsoft Exchange Server Inter-Organization Replication tool to configure free busy \ calendar information since you have exchange 2003 in target domain.

The tool and its documentation can be downloaded through below links.

Some more information on this topic

Aanand Singh KarkiConnect With a Mentor Associate ConsultantCommented:
Hi Seanie,

I Hope you have 2 Domains located in 2 Different Forests.

Minimum requirement to achieve Free/Busy and Calander Sharing Features is to have a trust running between the two forest and then next step is to use the InterOrg Replication Tool to replicate Free/Busy information. This allows recipients from one organization to schedule meetings with recipients in the other organization, and to be able to view each other's free/busy information.

hope these Articles will help you to achieve your requirement

Aanand Singh
Will SzymkowskiConnect With a Mentor Senior Solution ArchitectCommented:
There are some high level steps involved to get this accomplished. See below..

- forest trust between both domains
- service connection points need to be configured
- autodiscover needs to be accessible, both domains
- internal EWS URL needs to be accessible both domain
- depending on the outlook version 2003 clients require public folder access in the target domain for free/busy information.
- you will have to also use GalSync for exchange 2010 to shre gal information as well

See the link below for complete details.

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