What is difference between exchange 2003 standard &
Enterprise Edition.

Answer Posted / firoz s. k

Exchange Server 2003 Standard Edition is designed to meet
the messaging and collaboration needs of small and medium
corporations, and for specific messaging server roles or
branch offices.
Exchange Server 2003 Enterprise Edition, designed for large
enterprise corporations, enables you to create multiple
storage groups and multiple databases. Exchange Server 2003
Enterprise Edition provides a 16-terabyte message store
that removes the constraints on the number of users and
amount of data that a single server can manage.

But what IS the difference?



Let's take a look at the features in which both versions
differ.

FEATURE 1: Storage Group Support
Standard Edition supports 1 storage group, and Enterprise
Edition supports up to 4 storage groups. Both Editions
support the Recovery Storage Group!

FEATURE 2: Number of databases per storage group
Standard Edition supports only 1 mailbox store and 1 public
folder store. Enterprise Edition allows you to have 5
databases per storage group, private or public.

FEATURE 3: Total Database Size
Now here it is absolutely vital that you realize that there
is a huge change with SP2!
Prior to Microsoft® Exchange Server 2003 Service Pack 2
(SP2), there was no method to configure database size
limits for Exchange Server 2003. Exchange Server 2003 SP2
introduces the following new features:


For the Standard Edition, the default configured database
size limit will now be 18 GB, a 2 GB addition to the
previous limit, with a new maximum size of 75 GB
For the Enterprise Edition, there is no default configured
database size limit, and no software set maximum size.


Both versions of Exchange Server 2003 with SP2 have the
ability to configure a limit, a warning threshold, and a
warning interval set through registry keys.


Size check done against the database now uses logical
database size. Empty or white space in the database does
not count against the configured database size limit;
therefore, no offline defragmenting is required for
recovery exceeding the configured or licensed database
limits.


Limit checks, done at regular intervals, are now controlled
by the store process instead of JET. The default time
interval is 24 hours and this interval is configurable
through the registry. When your database size reaches the
limit, the store will be dismounted every time the size is
checked. So when you mount your store, the database will
be accessible for users, but the store will dismount again
within 24 hours, unless you decrease the size of the store.
Don't forget: offline defrag doesn't solve the problem
anymore, since Exchange considers the logical database size
now! Cleaning is the message now :-)

To make these changes, check out the following article from
Microsoft: Database Size Limit Configuration and Management

FEATURE 4: Exchange Server clustering
Standard Edition does not support clustering, Enterprise
Edition does.

FEATURE 5: X.400 Connector
The X.400 connector is NOT included in the Standard
Edition, it is included with the Enterprise Edition

FEATURE 6: The Price
No comment.

That's it...in short...the difference between standard
edition and enterprise edition, Exchange Server 2003 SP2.

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