[otrs] clear text user password in external backend

I have an existing billing system where the user's passwords happen to be stored in MSSQL in plain text. This is an existing system written by another company and I am not at liberty to change it. Is there any way to configure OTRS to use an external backend with plain text passwords? I saw an old thread on the topic in the archives and the answer a few years ago was "No"...any chance that's changed?