在O365中，没有简单的方法(或几乎任何方法)来实现这一目标.租户限制仅在您可以控制出口点时才起作用，而对于家用或移动设备则无能为力.

There is no easy (or practically any) method to achieve this in O365. Tenant restrictions only work when you can control the egress point, which is not something you can do for home or mobile devices.

例如，条件访问允许您基于IP设置限制，但是您不能基于时间强制执行限制.嗯，从技术上讲，您可以按计划启用/停用它们，但是，一旦用户通过身份验证，他就可以继续使用该服务， 除非您还开始弄乱令牌的生命周期...然后它会变得非常混乱.

Conditional access allows you to set up restrictions based on IP for example, but you cannot enforce them based on the time. Well, technically you can enable/disable them on a schedule, however once the user has authenticated he can continue using the service, unless you also start messing with the token lifetimes... and then it gets real messy.