Evidence of undocumented traffic from APX 530 on port 8472

Hello,
I just noticed traffic with my access point on udp port 8472.

I can find no documentation of this traffic other than a vague reference to it in this article:
https://support.sophos.com/support/s/article/KB-000038682?language=en_US


Can someone help me understand what this is?

Thanks,

Doug