Dash player and files from kaltura Akamai CDN

I have a dash player which plays an mpd file (using dash.js)

The content of the mpd file (the clip themsleves) are point to kaltura akamai cdn.
The dash.js player tries to get the files with Range Header,.
When using a cross domain requests, and have a nonstandard headers (https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS) the browser send a preliminary request (OPTIONS - Preflighted requests) to see if the source allow that.
But then the cdn returns a 501 Options not supported.
Anyway to solve this? Is there a way to replace the header with url paramter? (I saw seekFromBytes but it doesn’t seems to work)