There is no option to modify the password in OWA in Exchange 2003. However, this feature is precisely what users often use, because Exchange uses domain user authentication, and some users may not be able to modify their password without joining the domain, this article explains how to add the option to modify the password in OWA.
1, through the registry settings display "Change Password"
Expand through the registry in the Exchange Server
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeWEB\OWA
option, locate the DisablePassword value, and modify the numeric data to 0 (the original value is 1).
Description: 1 represents the "Change Password" button in the hidden OWA, and 0 represents the "Change Password" button in OWA
At this point, the option to change password is already visible in the options for logging on to OWA.
2, add password management virtual directory
In the Exchange Server, add a virtual directory name to the default Web site under IIS iisadmpwd (name is not modifiable), directory path is C:\WINDOWS\system32\inetsrv\iisadmpwd directory, no errors, This virtual directory is then given permission to read and write and execute (such as ISAPI applications or CGI).