您 还 需要 确保 您 的 应用 程序 在 Office 相关 应用 程序 & # 91 ; 权限 模型 & # 93 ; ( how-to-set-folder-permissions-for-another-user-by-using-ews-in-exchange.md ) 中 请求 & quot ; 读 / 写 邮箱 & quot ; 权限 。

You also need to make sure that your app requests the read / write mailbox permission in the apps for Office &#91; permission model &#93; ( how-to-set-folder-permissions-for-another-user-by-using-ews-in-exchange.md ) .
