Exchange 2000 hosting was an early application service provider (ASP) model: a provider operated Microsoft messaging software and the supporting infrastructure, then delivered email and collaboration services to customers over the Internet. Microsoft announced Exchange 2000’s general availability on October 10, 2000. The model depended on more than the server software: it brought together hosting capacity, service provisioning, technical support, and a commercial licensing approach.
What was the ASP model?
An application service provider delivered software as a service that customers accessed remotely, rather than requiring each customer to run and manage the application on its own premises. For hosted Exchange, the provider took responsibility for operating the messaging environment and its infrastructure, while customers used email and collaboration features over the Internet.
Microsoft’s July 2000 ASP initiative described an ecosystem with several roles, not one supplier doing everything. ASP enablers could provide hosting capacity and operational infrastructure; other partners could develop hosted solutions, customize them, or sell the services. Microsoft also announced professional services, technical-readiness materials, and a certification program for partners. These were elements of the announced initiative, not proof that every partner or offering followed the same arrangement.
Compared with an on-premises Exchange deployment, hosting shifted infrastructure operation and much of the application administration to a provider. The customer experience depended on how the provider handled account provisioning, security and resource separation, support, and billing. Microsoft’s announcements describe these operational dimensions but do not establish numerical cost savings or service-level guarantees.
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How did Exchange 2000 hosting work?
The provider ran Exchange and the underlying hosting environment, provisioned customer users and resources, and delivered the resulting messaging service over the Internet. Customers consumed the service without operating the hosted Exchange infrastructure themselves. The exact division of support duties and the technical arrangement could vary by provider; the announcements do not define a single universal architecture or contract.
Hosted Exchange services were already being sold before Exchange 2000 became generally available. In January 2000, Microsoft named providers hosting Exchange Server 5.5 and said many planned to offer Exchange 2000 services. USinternetworking executive Nick Magliato described customers accessing Exchange 5.5 messaging and collaboration over the Internet. Microsoft framed managed messaging as a way for customers to obtain email and collaboration while providers handled infrastructure and application management; that was the company’s positioning, not an independently measured outcome.
Microsoft’s October 24, 2000 announcement positioned consumer services for carriers, Internet service providers, and portals. It described email with add-on services such as calendaring and instant messaging, commercial licensing aimed at consumers and small businesses, partner extensions to provisioning, and migration services for MCIS 2.5 customers. These details describe the program’s announced scope and plans at that time; they do not establish that every planned service launched on schedule.
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What did the Exchange 2000 Hosting Pack do?
Microsoft described the Hosting Pack as an extension to Exchange 2000 that added capabilities for provisioning hosted services. The package connected routine technical administration with the provider’s service operations:
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- Web self-service and user registration: customers or users could register through a web interface, reducing reliance on manual setup.
- Resource allocation: providers could allocate resources for hosted users and services.
- Security enforcement: the package included functions to apply security controls in a shared-service environment.
- Provisioning logs: records of provisioning activity could support billing.
- Customization and extension: providers could adapt and extend the package for their own services.
Microsoft said it had issued the Hosting Pack to selected ASPs when Exchange 2000 reached general availability on October 10, 2000. General availability of the Hosting Pack was then a target for the first half of 2001, not a feature Microsoft said was generally available in October 2000.
Which companies hosted Exchange?
Microsoft’s January 2000 announcement named providers already hosting Exchange Server 5.5 and indicated that many planned to add Exchange 2000. In its October 10, 2000 launch announcement, Microsoft reported that more than 40 ASPs were delivering hosted services on the Exchange platform. That is Microsoft’s reported figure, not an independently audited count.
The October launch announcement also reported more than 250,000 Exchange 2000 seats in production. Microsoft did not present that launch figure as an independent audit. The same announcement said 6,000 customers and partners attended the Exchange and Collaboration Solutions Conference 2000; that, too, is an attendance figure reported by Microsoft.
Those figures indicate how Microsoft presented the platform’s early adoption and partner ecosystem. They should not be read as a complete market census, a guarantee of a particular provider’s service quality, or evidence that all named or counted providers offered identical features.
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How was hosted Exchange licensed?
In July 2000, Microsoft announced subscription licensing for Windows 2000, SQL Server 2000, Exchange 2000 Server, and Office 2000 when those products were delivered as hosted services. The announcement placed licensing within the ASP model: providers needed a commercial way to offer Microsoft software as a service rather than treating hosted delivery as an ordinary customer-installed deployment.
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Microsoft’s October 24 announcement also described commercial licensing optimized for consumer and small-business Exchange services. The cited announcements do not establish all contract terms, prices, or the precise licensing treatment for every provider and customer in 2000, so those details should not be inferred from the general subscription announcement.
Microsoft’s current Services Provider License Agreement (SPLA) guidance is a separate, present-day program. It describes monthly licensing for eligible hosted software services, including service providers in ASP and messaging/collaboration categories, and places licensing and compliance responsibility on the provider. Its present rules should not be projected backward as the terms that governed Exchange 2000 hosting in 2000. Check Microsoft’s current SPLA program guidance for details, which can change.
What did Microsoft claim Exchange 2000 could support?
Microsoft and Compaq reported that Exchange 2000 could scale to 2 million mailboxes managed on one Active Directory directory for a typical consumer email workload. This is a vendor-reported, workload-qualified claim from October 24, 2000—not a general capacity guarantee or independently verified benchmark. Capacity in a real hosted service would depend on workload and implementation, and the announcement does not provide a universal sizing rule.
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