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Remove Exchange 5.5 servers from a mixed mode Exchange environment

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QUESTION POSED ON: 19 February 2008
Exchange Server 5.5 and Exchange Server 2003 are running in mixed mode. One of our three Active Directory (AD) sites is in a separate forest and we would like to create a single forest to remove all of the Exchange 5.5 servers, which are only used for global address list (GAL) replications. How can we accomplish this?

We have a single Exchange organization and three AD sites connected through a Multiprotocol Label Switching (MPLS) cloud.


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You'll want to use your favorite Internet search engine to search for "interorg Exchange migrations" or similar keywords. A number of Exchange administration tools exist on the market to assist you with what you're trying to achieve.

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Related information from SearchExchange.com:

  • Expert Advice: Tool suggestions for an Exchange Server migration
  • Tip: Event log errors between Exchange 5.5 and Exchange 2003
  • Tip: Preparing for a mailbox migration
  • 11 tips in 11 minutes: Migrating from Exchange Server 5.5 to 2003
  • Reference Center: Exchange deployment and migration advice

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