This feature requires you to use a Microsoft Exchange account. Most home and personal accounts do not use Exchange.
In addition to inviting people to attend meetings, you can also schedule resources, such as the conference room where you plan to hold the meeting, or the slide projector you plan to use for a presentation.
In order to schedule a resource, the resource must have its own mailbox on your server. An individual in the organization sets up the mailbox and gives permission to others to schedule the resource. Aside from that, the resource is self-sufficient, accepting and rejecting invitations automatically. When you want to schedule the resource, you can invite it to a meeting. The invitation is accepted if the resource is free, and the meeting is automatically entered in the resource’s calendar.
The administrator for the resource can restrict the ability to schedule the resource. For example, if only managers are allowed to schedule certain conference rooms, the administrator can set permissions so that requests from managers are accepted and requests from non-managers are declined.