Optimizing CRM Data for Effective Meta Ads Targeting

Hi everyone, looking for advice. We’d like to start running meta ads to our clients and other lookalike audiences. We have about 9000 contacts with emails in our CRM. I exported all of them and uploaded them to meta, which didn’t create an audience bigger than 1000. I’m assuming it’s because the emails in our CRM are work emails and I’m guessing that most people use their personal email for FB/Instagram. Thoughts on how I can take our current data and use Clay to enrich it in a way that will allow me to create a larger meta audience to work with?