Key is stored in legacy trusted.gpg keyring

首先sudo apt-key list查看有警告的key

然后导出到/etc/apt/trust.gpg.d/microsoft.gpg，后8字符就可以BE1229CF

apt-key export BE1229CF|sudo gpg --dearmour -o /etc/apt/trusted.gpg.d/microsoft.gpg

然后sudo apt update测试一下，如果没有经过则可以直接删除

sudo apt-key del BE1229CF

如果依然有警告，还需要编辑对应的apt-list文件/etc/apt/sources.list.d/microsoft.list

deb [arch=amd64 signed-by=/etc/apt/trusted.gpg.d/microsoft.gpg] https://packages.microsoft.com/repos/ms-teams stable main