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Microsoft had sold a number of email products before Exchange. Exchange Server was an entirely new X. Active Directory was integrated into Windows as the foundation of Windows Server domains.
The first release of Exchange outside of Microsoft was Exchange Server 4. Introduced the new Exchange Administrator console, as well as opening up "integrated" access to SMTP -based networks for the first time. Along with Exchange Server version 5. It was sold in two editions: They differ in database store size, mail transport connectors, and clustering capabilities.
Codenamed "Platinum", this version overcame many of the limitations of its predecessors. For example, it raised the maximum sizes of databases and increased the number of servers in a cluster from two to four. However, many customers were deterred from upgrading by the requirement for a full Microsoft Active Directory infrastructure to be in place, as unlike Exchange Server 5. The migration process from Exchange Server 5.
Exchange Server also added support for instant messaging , but that capability was later spun off to Microsoft Office Live Communications Server. Codenamed "Titanium", this version can be run on Windows Server with Service Pack 4 and bit Windows Server , although some new features only work with the latter.
Like Windows Server , Exchange Server has many compatibility modes to allow users to slowly migrate to the new system. This is useful in large companies with distributed Exchange Server environments who cannot afford the downtime and expense that comes with a complete migration. It made the migration from pre versions of Exchange significantly easier although still involved the same basic steps , and many users of Exchange Server 5. The upgrade process also required upgrading a company's servers to Windows Some customers opted to stay on a combination of Exchange Server 5.
One of the new features in Exchange Server is enhanced disaster recovery,  which allows administrators to bring the server online more quickly. This is done by allowing the server to send and receive mail while the message stores are being recovered from backup.
Also new is the ability to drop inbound e-mail before being fully processed, thus preventing delays in the message routing system. There are also improved message and mailbox management tools, which allow administrators to execute common chores more quickly. Others, such as Instant Messaging and Exchange Conferencing Server have been extracted completely in order to form separate products.
Exchange Server is now to be simply e-mail and calendaring. Exchange Server added several basic filtering methods to Exchange Server. They are not sophisticated enough to eliminate spam, but they can protect against DoS and mailbox flooding attacks. Exchange mainstream support ended on April 14, Released to business customers as part of Microsoft's roll-out wave of new products. It includes new clustering options, x64 support for greater scalability, voice mail integration, better search and support for Web services, better filtering options, and a new Outlook Web Access interface.
Exchange also dropped support for Exchange 5. Exchange Server v8, code name E12, or with SP1 v8. This requirement applies to supported production environments only; a bit trial version is available for download and testing.
Hence, companies currently running Exchange Server on bit hardware will be required to replace or migrate hardware if they wish to upgrade to the new version. The first beta of Exchange Server then named "Exchange 12" or E12 was released in December to a very limited number of beta testers.
Exchange Server is an integrated part of the Innovative Communications Alliance products. Exchange Server was released to manufacturing in May , and reached general availability on November 9, Several high-availability options have been consolidated into just one option for Exchange Server Mailbox Resiliency , which is now offered in both the Standard and Enterprise editions. These capabilities enable a simplified approach to high availability and disaster recovery.
While the Enterprise Edition supports up to databases with no size limit. For more detail on new features, see the following Microsoft TechNet article: What's new in Exchange From Wikipedia, the free encyclopedia. Retrieved 28 October Archived from the original on May 7, Archived from the original on July 6, Retrieved 8 April The Microsoft Exchange Team Blog. Retrieved January 27, The Exchange Team Blog. Retrieved 17 November Retrieved 11 February Forged in the cloud.