Re: Was this
Cheap almost free open source monitoring software can keep an eye on certificates and give you prior warning that the date in one is approaching. You can choose how much warning you want and it will display it on a dashboard in red, ,send you an email or automatically open an ITIL compliant helpdesk ticket for you, with P1 urgency if you want.
Even the most shoddy IT shops I've dealt with have this sorted. It's really simple stuff.