How to : Determine the version number, build number & the service pack of Exchange Server?

Determine version number of Exchange:
To determine the version number, the build number, and the service pack level of a Microsoft Exchange Server computer, check the following properties of the server.

If you have Exchange Server 4.0, Exchange Server 5.0, or Exchange Server 5.5 then you can, follow these steps:

1. Start the Microsoft Exchange Administrator program.
2. In the left pane, expand the objects until you locate the server object, and then click the server object.
3. On the File menu, click Properties.

If you have Microsoft Exchange 2000 Server or Microsoft Exchange Server 2003 computer, then follow these steps:

1. Start the Microsoft Exchange Administrator program.
2. In the left pane, expand the objects until you locate the server object.
3. Right-click the server object, and then click Properties.

Build numbers and version numbers of the Exchange Server:
Each version of Microsoft Exchange Server has a different build number. The following table lists the build numbers and general release dates for each version.