Sync GAL and calendars of separate Exchange Server orgs

I have two Exchange 2000 organizations. I need to synchronize the Global Address List (GAL) and calendar data between the two Exchange organizations. Is this possible?
Yes, there are tools to synchronize between two separate Exchange Server organizations, even of different versions.

There are two versions of Microsoft's Identity Integration Server (MIIS). Let's start with the basic and free version. The MIIS Identity Integration Feature Pack will let you synchronize between Active Directory (AD) in different Windows 2000 and Windows 2003 AD Forests. There is also the full version of MIIS which has a feature called Global Address List Synchronization for synchronizing with Exchange 5.5; it also works with other directories and can be customized.

For synchronizing free/busy information, you can use a tool called the InterOrg Replication Utility. This tool will also allow you to synchronize public folders between the Exchange organizations.

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More information on Exchange synchronization and replication:

  • Expert Advice: Tool suggestions for an Exchange 5.5 to 2003 migration
  • Expert Advice: Create a distribution list with data from another source
  • Learning Center: Exchange Server replication remedies
  • Reference Center: Microsoft Exchange synchronization and replication

    • This was first published in March 2004

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