domain move tool

 I got an official reply : 

"This is to inform you that unfortunately, the site move tool is no longer available in new Bing Webmaster console. It has been ruled out. I would request you to please apply 301 redirect on the site server for redirection of any site or page URLs.

The 301 redirect defines a redirect which tells the search engine the content has moved permanently to a new location.  This is preferred as it clearly states the intent to move and instructs the engine to transfer any value the URL has accrued from the old URL to the new location.  It’s important to know that the 301 redirect does not pass all of the value from an old URL to a new one.  The new URL does need to build its own level of trust with the engines, which is why we won’t simply transfer full value to new URLs.

This is sufficient for Bing to understand that you want the new site to be indexed instead of the old ones and this normally happens automatically."

Astrakan