What type of RADIUS authentication protocol is used by Defender? Does Defender support CHAP, PAP or MS-CHAP/ MS-CHAP v2?
Defender only provides full support for PAP. CHAP is not supported.
Defender has limited support for MS-CHAP v2, refer Knowledge Article, 71689, for details on MS-CHAP v2 support Does Defender support MS-CHAP v2?