We are receiving the same error The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer with Error 789 in Windows application log. We seem to have exhausted every resolution provided searching the web along with those here. What is odd is that we have one computer (Acer) Win10 that is current and successfully connects, however no other computer (HP, Dell) Win10 or Win11 will connect and are receiving this error.
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