First, it is important to determine if you are being laid off or if you are being placed on a "temporary leave in accordance with your company's leave policies."
In the first scenario, being laid off, this means that you do not have a job to come back to and will be asked to reapply. If you are placed on leave – whether paid or unpaid – this means that your workplace is temporarily suspending services but will keep your position for you and expect you to return when the company reopens. If you are not sure, ask this question directly of your boss or your HR office, as this is a very important distinction.
If you are being placed on leave in accordance with an official policy, then the days you are not working will not count as unemployment and will not count against your 90-day maximum period of unemployment (your "unemployment clock").
If you are being laid off, however, you are required to report this end in employment to the International Student Coordinator within 10 days. These days will count against your 90-day unemployment clock.
NOTE: It is important to note that the international education community has asked SEVP and USCIS to issue guidance on this situation and to consider a temporary halt in counting of unemployment days – if any update is released (and we hope it will be) we will post that information here. In the meantime, we have to operate under the normal F-1 rules. If you are not clear on how many days you have left of your 90-day unemployment clock, please contact the International Student Coordinator for an update.