Hi,

EAP225-Outdoor does not support bridge/repeater mode. But it support Mesh function. You can use the Mesh function to connect one EAP225-Outdoor to another via wireless connection, just like the following topology: Router---EAP225-Outdoor  )))  EAP225-Outdoor.

You can refer to page 40 of UG of Omada Controller: https://static.tp-link.com/2018/201811/20181109/1910012484_Omada%20Controller%20Software%203.0.5_UG.pdf