@kramnworb Hi, welcome to the community.

For Deco X/XE, and BE series models, Mesh nodes within the same package are pre-configured. Once the main Deco is set up, satellite nodes will automatically join the mesh network after powering up. If not, please hold the reset pinhole for 1s and wait for about 2 minutes, then check whether the second XE75 could turn green.

If it remains flashing blue, please go to the Deco APP and click "+" on the top right>>Add a Deco unit.

Thank you very much and best regards.