As of January 11th 2021, Let's Encrypt certificates will stop working with outdated devices, such as Android version 7.0 and lower, due to necessary changes in the certificate chain.
However, we will prolong support until 12th of July 2021 by applying a fallback behaviour to our supported Managed Server versions 6 and 7. Managed Server version 5, which is End-Of-Life since July 2020, will use the new certificate chain right away on the 11th of January 2021. Older Managed Server versions are not affected.
For further explanation, we refer to the corresponding blog article.
