We are aware of an issue with users currently receiving a notification within outlook towards email services about an SSL Certificate, this warning can be safely ignored and you can click to ignore the alert, and be rest assured that your SSL certificates are functioning as normal and protecting your data.
The issue is currently affecting multiple business's across the world and is being investigated with high urgency by our third party provider at cPanel, please refer to the documentation below and see the notice on the top of the website which cPanel has notified customers that they are aware of the issue.
https://support.cpanel.net/hc/en-us/articles/4409770365335
The fix has been rolled out but if your hosting account is still having issues please let us know via support and we will manually fix this for you.