How to Encrypt Passwords for IMAP mailbox APP for Windows OS

[ips_mandar]

Hi all
I want to encrypt my Password using splunk.secret key for IMAP mailbox app for windows OS.I already gone through this post-
https://answers.splunk.com/answers/215283/how-to-use-encrypted-passwords-in-imap-mailbox-app.html but it won't help me.
Anyone knows how to encrypt password in Windows OS to use in imap.conf file for IMAP app..
or is there any other app to get email messages in splunk. My Splunk version is 7.1.2

Thanks.