Suraj Gadage: In Bing Webmasters account, under Diagnostics & Tools you have 'Site Move' tool. ;Use this tool to tell Bing that you have moved and permanently redirected your site (or a section of your site) to a new location. ;
Albeit, permanently redirecting your Site/URLs (from http to https) using 301 redirects is sufficient for Bing to understand that you want the new URLs to be indexed instead of the old ones and this normally happens automatically, the 'Site Move' tool can help expedite this process.
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Amit Kumar: you can remove the "http" site from your account, then add the "https" site. Once you have done, you can use the Site Move tool.