Microsoft Exchange Server 2003 Deployment Guide- P55:Your Exchange Server 2003 deployment plan should reflect your understanding of how Exchange and Microsoft Windows Server™ operating systems interoperate. It should encompass the relationships between Windows Server 2003 and Microsoft Windows® 2000 Server sites and domains, domain controllers, global catalog servers, and Exchange 2003 administrative and routing groups. | 541 Feature Available across forests Calendar viewing No. Although you can synchronize free and busy information across forests and use it to schedule meetings you cannot use the Open Other User s Folder feature in Outlook to view the calendar details for a user in another forest. Group membership viewing No. Because a group from another forest is represented as a contact you cannot view the group s members. Group membership is not expanded until the e-mail message is sent to the source forest. Connectors to foreign messaging systems Yes. If one forest is connected to a foreign messaging system and you are using MIIS 2003 you can replicate the foreign messaging system contacts to other forests. 542 Feature Available across forests Send as No. Users must be located in the same forest. Front-end server to multiple forests No. A front-end server cannot proxy requests to a back-end server in a different forest. This limitation applies whether you are using a front-end server for Outlook Web Access or Outlook Mobile Access. Exchange 2000 Instant Messaging Service Yes but the forests cannot share the same namespace Using Gal Synchronization in MIIS 2003 By default a global address list GAL contains mail recipients from a single forest. If you have a multiple forest environment you can use the GAL Synchronization feature in Microsoft Integration Identity Server MIIS 2003 to ensure that the GAL in any given forest contains mail 543 recipients from other forests. This feature creates mail-enabled contacts that represent recipients from other forests thereby allowing users to view them in the GAL and send mail. For example users in Forest A appear as contacts in Forest B and vice versa. Users in the target forest can then select the contact object that represents a recipient in another forest to send mail. If each forest contains at least one Exchange 2003 server you can use MIIS 2003 to synchronize forests that are running any combination of Exchange Exchange 2000 and .
