We have an employee who joined us 2 months ago. He went on an unapproved leave citing health reasons. Despite several calls and a couple of emails asking him to report to work and provide medical certificates, he has not responded. He recently called saying his dad is unwell, and he wants to work from home. He is on probation, and his performance has been extremely poor in these last 2 months. We do not provide work from home for long periods, and since he says he cannot report to the office, can we terminate his employment by giving him notice? Please suggest what's the best action to deal with this.