I'm in the same boat. I believe I updated fully to TLS 1.2 yesterday prior to 2pm Pacific, and it works okay at www.sandbox.paypal.com... However got a threatening email from PayPal this morning, telling me my payments will no longer be processed: "Our records show that your PayPal integration uses an older encryption protocol. You must take the following actions immediately to upgrade your PayPal integration(s) to the TLS 1.2 cryptographic protocol by June 27, 2018. " I put another sandbox transaction through the at 9:24am PST today (6/27/18), please can you confirm everything is okay your end. For the next time you upgrade your systems, I recommend providing a report to your users indicating where the problem is (a log of the transaction process).
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