In addition to @JasonWalker prior posts, I’ve found it helpful to set a custom property named _BESClient_NetSignature. Additional details regarding this setting can be found on this forum post as well as my Generic BESClient Default Settings fixlet from my personal GitHub.
If you’re looking for additional custom BESClient properties to assist with BESRelay affiliation, please checkout this forum post or my IPSubnetInfo content that’s also on my private GitHub.