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I need some clarification on how timestamps work because I am getting an error 97. We are using the SIM integration. On a clients web server they are experiencing this problem. Their web server time zone is set to GMT with daylight savings ticked. As...

I am trying to upgrade from MD5 to the new hash method as described here:- https://developer.authorize.net/support/hash_upgrade We are using SIM still do in addition I read the guide at https://support.authorize.net/s/article/Do-I-need-to-upgrade-my-...