How to find the IP address of a managed switch?

Question

TP Link

Greetings.
When moving to a new network, the managed switch was connected to the wires.
he didn't get the address via dhcp (and he shouldn't have)
the IP range of the old mesh is forgotten....
How easy is it to find it on the network?
The login and password are known, and that the network was from a private range.

Answer 1

www.tp-link.com/en/download/TL-SG108e_V2.html#Utility