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On April 23rd, 2021, SSLv3 will no longer be a supported protocol on Symantec LiveUpdate servers
Article ID: 212361
Endpoint ProtectionEndpoint Security
Starting on April 23rd, 2021, SSLv3 support for Symantec public LiveUpdate servers will no longer be available. Affected operating systems which do not have updates that include support for newer protocols will experience LiveUpdate failures.
Windows 2008 R2
Ensure Operating Systems listed above have updates in place which enable support for the remaining supported protocols on Symantec LiveUpdate servers.