When you plan to purchase Exchange 2007, you need to make sure you purchase the correct edition of Exchange server and purchase the client access licenses to license the features that you will require. Table 2.7 lists some of the features that are included with Exchange 2007 Standard Edition and Enterprise Edition.
Feature | Standard | Enterprise |
---|---|---|
Maximum database size | 16TB (unlimited) | 16TB (unlimited) |
Maximum number of storage groups | 5 | 50 |
Supports Recovery Storage Group | ü | ü |
Number of databases | 5 | 50 |
Supports Client Access server role | ü | ü |
Supports single-copy clustered Mailbox servers | ü | |
Supports clustered continuous replication Mailbox servers | ü | |
Supports Edge Transport role | ü | ü |
Supports Hub Transport role | ü | ü |
Supports local continuous replication | ü | ü |
Supports Mailbox role | ü | ü |
Supports Unified Messaging role | ü | ü |
In the past, you only had a single option when purchasing Exchange Server client access licenses (CALs). Exchange 2007 introduces the Exchange Enterprise CAL and Exchange Standard CAL. Either can be used against either Exchange Server Enterprise Edition or Exchange Server Standard Edition. The choice for which CAL you require will depend on which premium features of Exchange Server 2007 you are going to require.
The Exchange Enterprise CAL adds additional features above and beyond the Exchange Standard CAL. The Exchange Standard CAL provides your users with the ability to use Exchange features such as accessing their mailbox from a MAPI client, Outlook Web Access, ActiveSync devices, and Outlook Anywhere (RPC over HTTP). The Exchange Enterprise CAL includes the following additional functions:
Unified Messaging services
Microsoft Forefront Security for Exchange Server
Advanced compliance capabilities such as per-user and per-distribution group journaling
Messaging records management features
Anti-spam and antivirus protection using Microsoft Exchange Hosted Filtering Services as an external service provider
Standard client access licenses must be purchased for each mailbox that is accessed on your system. If you have users that use multiple devices (Outlook, Outlook Web Access, Windows Mobile, ActiveSync, Outlook Anywhere) to access their mailbox and their total percentage of time accessing their mailbox from their primary device is less than 80 percent, then you must purchase an additional CAL for each user.
If you use Exchange Enterprise CALs for all of your users, then you get to use all of the features available for Enterprise CALs. However, if you purchase Enterprise CALs only for a subset of your users that require a feature such as Unified Messaging and Journaling and also choose to use Forefront Security for Exchange, then the remainder of the users must be licensed separately for Forefront Security for Exchange.