On September 27th, 2019 we will renew the SSL/TLS certificate for *.mendixcloud.com. Browsers like Mozilla Firefox, Microsoft Edge, Google Chrome and Internet Explorer automatically trust the new certificate. In that case there is nothing you have to do.
If you run services that connect to a *.mendixcloud.com endpoint and use a static or outdated trust store, we advise you to update them.
Technical details about this renewal are provided on https://docs.mendix.com/releasenotes/developer-portal/#advance-notice