Frequency for Sophos anti-virus definition file update checking.

Dear PIC,

We has introduced Sophos endpoint and it is configuration for relay server and agent sever.

I believe relay server access to Sophos AV definition database periodically and if the new AV definition file is released, that is downloaded automatically.

About this, how often check to Sophos AV definition database if new one is released from relay server?

Thank you,

Best regards.