Is there a grace period after a licence expires?
Yes, and it is configurable per licence. The length is not fixed in this guide, so ask the Skie team what applies to yours and have it written into your agreement. During the notices and grace period, managed devices keep their rules while you arrange renewal.
A grace period gives an organisation time to renew without a hard edge. Skie lets the period be set on each licence, which means it can be different for different customers. It is part of what you agree, not a universal number.
While you are in the period, expiry notices appear on devices and in dashboards so that administrators and users see what is happening. Devices keep their last rules. The point is to prevent a lapse in protection while paperwork is in progress.
What the grace period does not do is replace renewal. At some point the licence has to be extended or ended. New enrolments are the first thing to stop, so a school adding a new batch should be aware of the date.
When you negotiate, ask three questions: how long the grace period is, what is limited during it, and what happens at the end of it. The honest answer to the third is part of your contract, and it is worth reading closely.
A practical tip: plan renewal around your academic calendar. A licence that ends in the middle of exams or just before admissions is a bad one. If your fiscal year does not match the school year, ask for the end date to match the term, and use the grace period as a cushion rather than a plan.