You can upload the same access log to two different servers.
In the Management Console, select Configuration > Access Logging > Logs > Upload Client.
You can only select one Upload Client type per log, for example FTP client. Under Settings, you can set both Primary and Alternate FTP server hosts, but Alternate server will be used only if Primary fails.
In the Management Console, select Configuration > Access Logging > General > Default Logging, one protocol can only be logged to one log file as default logging, and there is no option to add another default logging log file.