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Classroom does not use public meeting links as authorization. A user must be signed in to Kralis, active, attached to the same school, able to view the event, and admitted when the waiting room is enabled.

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Access sources

A user can receive event access from more than one source:
  • creating the event
  • being a school administrator or dean
  • a direct event grant
  • membership of a granted Classroom collaboration group
  • matching the event’s class and optional section audience
  • the event’s school-wide audience
Kralis evaluates all sources and uses the strongest role. A weaker direct grant does not override a stronger group grant.

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Event roles

The creator’s host grant cannot be revoked. School superusers, staff, administrators, and deans can manage school events as moderators. A manager cannot mute, remove, or change media permissions for themselves, a host, or anyone with an equal or stronger event role.

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Direct and group grants

Event managers can grant one role to:
  • an individual school user; or
  • a Classroom collaboration group.
Changing access or group membership during a live event updates the affected user’s role and media permissions. Fully revoking access disconnects a user who is already in the room. Do not add access after an event has ended merely to expose old history. The UI disables access changes for closed events; publish a recording or create a new event when post-event sharing is intended.

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Waiting room

The lobby opens at: scheduled start − join-before-start minutes Before that point Kralis rejects the admission request. During the open window:
  • hosts and moderators bypass the waiting room;
  • all users bypass it when waiting room is disabled;
  • other users create a persistent pending request;
  • a host or moderator can admit or reject the request;
  • an admitted user receives media access only after the event is live;
  • revoking admission disconnects an already connected user.
Admission changes are saved in Kralis and appear in the lobby immediately. If an update is delayed, the lobby refreshes the status automatically.

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Capacity and reconnects

maximum participants is enforced before a user enters. Kralis counts distinct active users and users currently completing admission so simultaneous requests cannot exceed capacity. Reconnecting users do not consume a second seat. A signed-in user may safely reconnect while their event access remains valid.

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School scoping

Every Classroom page and action stays within the signed-in user’s school, including administrator access. Users see only event details, attendance, recordings, grants, and history permitted by their event role.