These entries are queried from radb.net using whois, you can try my project getting these.
:AS-MICROSOFT as-set: AS-MICROSOFT descr: Microsoft AS-SET for AS8075 members: AS3598, AS5761, AS6584, AS8068, AS8069, AS8070, AS8071, AS8073, AS8075 members: AS20046, AS23468, AS58593, AS62540, AS198097, AS-LINKEDIN-TRANSIT admin-c: Mark Kasten tech-c: Mark Kasten notify: radb [at] microsoft.com mnt-by: MAINT-AS8075 changed: mkasten [at] microsoft.com 20221115 #16:13:11Z source: RADB as-set: AS-MICROSOFT descr: Microsoft AS-SET members: AS3598, AS6584, AS8068, AS8070, AS8071, AS8073, AS8075 members: AS20046, AS23468, AS62540, AS198015, AS198097 members: AS-LINKEDIN-TRANSIT notify: radb [at] microsoft.com mnt-by: MAINT-MICROSOFT changed: mkasten [at] microsoft.com 20190409 source: ALTDB