Hi @Roman B
We want to prevent students from using chat, voice and video calls with other pupils, while allowing them to contact teachers, via text chat.
If you want to assign policy to those specific users, it is recommended that you grant policies in the following order.
Before assigning policies to individual users or groups, start by setting the global (Org-wide default) policies so that they apply to the largest number of users in your organization. Once the global policies are set, you'll only need to assign policies to those users that require specialized policies. For example, you should set the policy for your Teams users could using chat, voice and video calls and choose the student and set the specific policy and apply the custom policy to them.
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