OK, I figured out. Have a Bing Map Developer Account is just the first step. Next you need to create a Bing Map key use your developer account following the instruction in Bing Map Help and then use it to configure the Bing Maps in the SharePoint using steps described here
サインインしたメンバーは投稿、更新のフォローなどができます。初めてですか?無料アカウントを登録してください。
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