You can follow below steps to change password of email account.
- Login to Windows server.
- Click on MailEnable to open it.
- Click on plus sign (+) to expand “PostOffice” and then click on “Domain”.
- Now click on MailBoxes and you will find all the available MailBoxes for that particular domain.
- Right click on particular MailBox and choose “properties” option.
- You will find a new dialoge box where you can change password according to your need.
- At last click on OK.