Exchange Server 2007 Editions and Client Access Licenses
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 | Exchange Server 2007 Editions |
| Exchange Server 2007 Client Access Licenses |
Exchange Server 2007 Editions
Exchange Server 2007 is offered in two server editions: Standard Edition and Enterprise Edition.
| • | Exchange Server 2007 Standard Edition is designed to meet the messaging and collaboration needs of small and medium corporations; it may also be appropriate for specific server roles or branch offices. |
| • | Exchange Server 2007 Enterprise Edition, designed for large enterprise corporations, enables creation of multiple storage groups and databases. |
| Exchange Server 2007 Edition Offerings | ||
| Feature | Standard Edition | Enterprise Edition |
Storage Group Support | 5 storage groups | 50 storage groups |
Database Support | 5 databases | 50 databases |
Database Storage Limit | 16 TB per database | 16 TB per database |
Single Copy Clusters | Not supported | Supported |
Local Continuous Replication | Supported | Supported |
Cluster Continuous Replication | Not supported | Supported |
Standby Continuous Replication *** | Supported | Supported |
The numbers of storage groups and databases in the above table is the maximum number of each object that can be created in each edition of Exchange Server 2007. In both editions of Exchange Server 2007, each storage group is limited to a maximum of five databases. Therefore, on the Standard Edition of Exchange Server 2007, the maximum number of databases per server is five, and on the Enterprise Edition of Exchange Server 2007, the maximum number of databases per server is fifty. For more information, see Managing Storage Groups and Databases at http://technet.microsoft.com/en-us/library/aa998926.aspx.
Exchange Server 2007 Client Access Licenses
Exchange Server 2007 is offered in two client access license (CAL) editions: Standard CAL and Enterprise CAL.
| • | The Exchange Server Standard CAL provides access to e-mail, shared calendaring and Outlook Web Access (OWA). In addition you will get advancements that reduce the cost and complexity of the messaging system by giving IT Administrators the messaging protection their company demands, the anywhere access their end users want and the reliability they need. |
| • | The Exchange Server Enterprise CAL is an additive CAL and requires that a Standard CAL is also purchased for each user or device. The Exchange Server Enterprise CAL provides access to Unified Messaging and advanced compliance, as well as Forefront Security for Exchange Server and Exchange Hosted Filtering for onsite and hosted antivirus and anti-spam protection. |
A CAL is required for each user or device (depending on the license) accessing the server. Either version of the CAL may be run against either version of the server.
The table below illustrates what features are included with the Exchange Server Standard CAL and Exchange Server Enterprise CAL. The last column illustrates what features can be accessed if you own both the Exchange Server Standard CAL and the Exchange Server Enterprise CAL.
Key:
= Feature included 
= Feature not included
| Exchange Server 2007 CAL Offerings | |||
| Feature | Standard CAL | Enterprise CAL* | Standard CAL + Enterprise CAL |
E-mail, shared calendaring, contacts, tasks, management | | | |
Outlook Web Access | | | |
Exchange ActiveSync | | | |
Advanced Exchange ActiveSync Policies *** | | | |
Unified Messaging | | | |
Per-User/Per-Distribution List Journaling | | | |
Managed E-mail Folders (Default Folders) | | | |
Managed E-mail Folders (Custom Folders) | | | |
Exchange Hosted Filtering** | | | |
Forefront Security for Exchange Server** | | | |
* Additive CAL, purchase of the Standard CAL is required for Standard offerings
** Offered only through Volume Licensing Programs, not available via retail purchase. Your right to access the online services ends without active Software Assurance.
*** Offered only through Exchange Server 2007 Service Pack 1 (SP1)