IDMAP_AUTORID(8) (NAME) idmap_autorid - idmap_autorid Samba Winbind (DESCRIPTION) idmap_autorid UID/GID SID idmap_tdb idmap_rid . idmap_rid (forest) uid/gid / . autorid.tdb . . (IDMAP OPTIONS) range = low - high UID GID . . UID GID . UID/GID . rangesize BUILTIN . rangesize 000 . : range = 100000 - 299999. rangesize = numberofidsperrange uid/gid . . SID RID (extension ranges) . autorid ( ) . : rangesize / RID . RID RID - . SID Everyone (S-1-1-0) Creator Owner (S-1-3-0) . SID . . . . read only = [ yes | no ] . idmap . no . ignore builtin = [ yes | no ] BUILTIN. no . (THE MAPPING FORMULAS) RID : ID = REDUCED RID + IDMAP RANGE LOW VALUE + RANGE NUMBER * RANGE SIZE REDUCED RID = RID % RANGE_SIZE DOMAIN RANGE INDEX = RID / RANGE_SIZE sid RANGE NUMBER ( ) . RID : RID = (ID - LOW ID) % RANGE SIZE + DOMAIN RANGE INDEX * RANGE SIZE DOMAIN RANGE INDEX sid RANGE NUMBER = (ID - LOW ID) / RANGE SIZE . (EXAMPLES) / . [global] security = ads workgroup = CUSTOMER realm = CUSTOMER.COM idmap config * : backend = autorid idmap config * : range = 1000000-1999999 idmap_autorid SFU . idmap sfu . [global] security = ads workgroup = CUSTOMER realm = CUSTOMER.COM idmap config * : backend = autorid idmap config * : range = 1000000-19999999 idmap config * : rangesize = 1000000 idmap config TRUSTED : backend = ad idmap config TRUSTED : range = 50000 - 99999 idmap config TRUSTED : schema_mode = sfu (AUTHOR) Samba Andrew Tridgell . Samba Samba Team . Samba 4.24.6 08/16/2026 IDMAP_AUTORID(8)