Symantec changed certificates used by the Software Update servers. ATP versions prior to 3.2 do not have the new certificates and will need to update to get them.
Customers on prior versions of the ATP software will need to update to ATP 3.2 or SEDR 4.x by May 30, 2020 or they will not be able to contact the software update servers, requiring an OSRestore to get to SEDR 4.x or later.
If you continue to use the ATP software after this date, other certificates for content delivery will also be expired. The appliance will not be able to pull down any new signatures or rulesets.
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