Exchange 2003 - How to verify if standard or Enteprise edition is installed

Here is the direct way to verify which Exchange 2003 version do you have:

2.Open c:\Exchange Server Setup Progress.log file, which is located on the root of your system drive. 
Search for one of the following entries: 

[13:47:12] This is a(n) Standard version of Microsoft Exchange Server
[14:44:10] This is a(n) Enterprise version of Microsoft Exchange Server 

Build numbers and release dates for Exchange Server 

 How to Determine Exchange Server Edition ,Version and Build number