"samba-tool user list" is listing accounts like SystemMailbox accounts like SM_a8d665f997c345098 and HealthMailbox accounts like HealthMailboxb07af0b. Such accounts should not be listed by samba-tool user list. SystemMailbox example: dn: CN=SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c},CN=Users,DC=exch,DC=lan objectClass: top objectClass: person objectClass: organizationalPerson objectClass: user cn: SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c} sn: SystemMailbox bb558c35-97f1-4cb9-8ff7-d53741dc928c instanceType: 4 whenCreated: 20230706042337.0Z displayName: Microsoft Exchange uSNCreated: 8621 proxyAddresses: SMTP:SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}@exch. lan submissionContLength: 1048576 mDBUseDefaults: FALSE mailNickname: SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c} name: SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c} objectGUID: ba0cde66-a1b9-4a25-80d5-a70a02abe314 userAccountControl: 514 codePage: 0 countryCode: 0 pwdLastSet: 0 primaryGroupID: 513 objectSid: S-1-5-21-723170749-3602280816-508656540-1623 accountExpires: 9223372036854775807 sAMAccountName: SM_a8d665f997c345098 sAMAccountType: 805306368 legacyExchangeDN: /o=Pullheim Inc/ou=Exchange Administrative Group (FYDIBOHF23 SPDLT)/cn=Recipients/cn=173949b23aa34463aa05cab5a803a2a5-SystemMailb userPrincipalName: SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}@exch.la n objectCategory: CN=Person,CN=Schema,CN=Configuration,DC=exch,DC=lan msExchRequireAuthToSendTo: TRUE mail: SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}@exch.lan msExchPoliciesIncluded: {26491cfc-9e50-4857-861b-0cb8df22b5d7} msExchPoliciesIncluded: cf4f050c-160b-4b3b-b815-84ab5ba97aaa msExchUMDtmfMap: firstNameLastName:7978366245269225582359731422983373537413292 82 msExchUMDtmfMap: lastNameFirstName:7978366245269225582359731422983373537413292 82 msExchUMDtmfMap: emailAddress:797836624526922558235973142298337353741329282 msExchRecipientDisplayType: 10 msExchELCMailboxFlags: 130 msExchVersion: 1126140425011200 msExchRecipientTypeDetails: 8388608 msExchUMEnabledFlags2: -1 msExchModerationFlags: 6 msExchTransportRecipientSettingsFlags: 0 msExchProvisioningFlags: 0 msExchTextMessagingState: 16842751 msExchTextMessagingState: 302120705 msExchArchiveQuota: 104857600 msExchArchiveWarnQuota: 94371840 msExchDumpsterQuota: 31457280 msExchDumpsterWarningQuota: 20971520 msExchWhenMailboxCreated: 20230706044715.0Z msExchCapabilityIdentifiers: 40 msExchCapabilityIdentifiers: 42 msExchCapabilityIdentifiers: 43 msExchCapabilityIdentifiers: 44 msExchCapabilityIdentifiers: 47 msExchCapabilityIdentifiers: 51 msExchCapabilityIdentifiers: 52 msExchMailboxAuditEnable: FALSE msExchMailboxAuditLogAgeLimit: 7776000 msExchBypassAudit: FALSE msExchAddressBookFlags: 1 msExchRecipientSoftDeletedStatus: 0 msExchCalendarLoggingQuota: 6291456 msExchGroupSecurityFlags: 0 msExchHomeServerName: /o=Pullheim Inc/ou=Exchange Administrative Group (FYDIBO HF23SPDLT)/cn=Configuration/cn=Servers/cn=EX-SRV msExchHideFromAddressLists: TRUE msExchMailboxSecurityDescriptor: O:PSG:PSD:(A;CI;CCLCRC;;;PS) msExchMasterAccountSid: S-1-5-10 msExchUserAccountControl: 2 msExchMailboxGuid:: K+mnmWQGZE2opt3SJGoz+A== msExchMailboxFolderSet: 0 msExchOABGeneratingMailboxBL: CN=Default Offline Address Book,CN=Offline Addre ss Lists,CN=Address Lists Container,CN=Pullheim Inc,CN=Microsoft Exchange,CN= Services,CN=Configuration,DC=exch,DC=lan msExchApprovalApplicationLink: CN=AutoGroup,CN=Approval Applications,CN=Pullhe im Inc,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=exch,DC=lan msExchApprovalApplicationLink: CN=ModeratedRecipients,CN=Approval Applications ,CN=Pullheim Inc,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=exch,D C=lan whenChanged: 20231207110720.0Z msExchMailboxTemplateLink: CN=ArbitrationMailbox,CN=Retention Policies Contain er,CN=Pullheim Inc,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=exch ,DC=lan homeMDB: CN=Mailbox Database 0458668364,CN=Databases,CN=Exchange Administrativ e Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Pullheim Inc,CN=Microso ft Exchange,CN=Services,CN=Configuration,DC=exch,DC=lan uSNChanged: 9462 distinguishedName: CN=SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c},CN=U sers,DC=exch,DC=lan HealthMailbox example dn: CN=HealthMailboxb07af0bbc4664d4d941afe10a6834071,CN=Monitoring Mailboxes,CN=Microsoft Exchange System Objects,DC=exch,DC=lan objectClass: top objectClass: person objectClass: organizationalPerson objectClass: user cn: HealthMailboxb07af0bbc4664d4d941afe10a6834071 instanceType: 4 whenCreated: 20230706045723.0Z displayName: HealthMailbox-ex-srv-001 uSNCreated: 8629 proxyAddresses: SIP:HealthMailboxb07af0bbc4664d4d941afe10a6834071@exch.lan proxyAddresses: SMTP:HealthMailboxb07af0bbc4664d4d941afe10a6834071@exch.lan garbageCollPeriod: 1209600 mDBUseDefaults: TRUE mailNickname: HealthMailboxb07af0bbc4664d4d941afe10a6834071 protocolSettings:: UmVtb3RlUG93ZXJTaGVsbMKnMQ== internetEncoding: 0 name: HealthMailboxb07af0bbc4664d4d941afe10a6834071 objectGUID: ee0a8e53-7abd-425c-a910-73c942253c9f userAccountControl: 66048 codePage: 0 countryCode: 0 pwdLastSet: 133338708252210010 primaryGroupID: 513 objectSid: S-1-5-21-723170749-3602280816-508656540-1633 accountExpires: 9223372036854775807 sAMAccountName: HealthMailboxb07af0b sAMAccountType: 805306368 showInAddressBook: CN=All Recipients(VLV),CN=All System Address Lists,CN=Addre ss Lists Container,CN=Pullheim Inc,CN=Microsoft Exchange,CN=Services,CN=Confi guration,DC=exch,DC=lan legacyExchangeDN: /o=Pullheim Inc/ou=Exchange Administrative Group (FYDIBOHF23 SPDLT)/cn=Recipients/cn=f8be1917eeed42129a78cfbd188be36f-HealthMailb userPrincipalName: HealthMailboxb07af0bbc4664d4d941afe10a6834071@exch.lan objectCategory: CN=Person,CN=Schema,CN=Configuration,DC=exch,DC=lan lastLogonTimestamp: 133338711869821430 mail: HealthMailboxb07af0bbc4664d4d941afe10a6834071@exch.lan msExchPoliciesExcluded: {26491cfc-9e50-4857-861b-0cb8df22b5d7} msExchUMDtmfMap: firstNameLastName:432584624526939778001 msExchUMDtmfMap: lastNameFirstName:432584624526939778001 msExchUMDtmfMap: emailAddress:432584624526920723022246643439412331026834071 msExchMDBRulesQuota: 256 msExchELCMailboxFlags: 2 msExchVersion: 88218628259840 msExchRecipientTypeDetails: 549755813888 msExchMobileMailboxFlags: 1 msExchUMEnabledFlags2: -1 msExchModerationFlags: 0 msExchTransportRecipientSettingsFlags: 0 msExchProvisioningFlags: 0 msExchTextMessagingState: 16842751 msExchTextMessagingState: 302120705 msExchArchiveName: In-Place Archive -HealthMailbox-ex-srv-001 msExchArchiveQuota: 104857600 msExchArchiveGUID:: L3UGayMerU6YMPfzZcHTCQ== msExchArchiveWarnQuota: 94371840 msExchDumpsterQuota: 31457280 msExchDumpsterWarningQuota: 20971520 msExchWhenMailboxCreated: 20230706045722.0Z msExchMailboxAuditEnable: FALSE msExchMailboxAuditLogAgeLimit: 7776000 msExchBypassAudit: FALSE msExchAddressBookFlags: 1 msExchRecipientSoftDeletedStatus: 0 msExchCalendarLoggingQuota: 6291456 msExchGroupSecurityFlags: 0 msExchHomeServerName: /o=Pullheim Inc/ou=Exchange Administrative Group (FYDIBO HF23SPDLT)/cn=Configuration/cn=Servers/cn=EX-SRV msExchHideFromAddressLists: TRUE msExchMailboxSecurityDescriptor: O:PSG:PSD:(A;CI;CCRC;;;PS) msExchUserAccountControl: 0 msExchMailboxGuid:: 7mUczozDJUGo9Dnhx0XOjg== msExchMailboxFolderSet: 0 msExchMailboxTemplateLink: CN=Default MRM Policy,CN=Retention Policies Contain er,CN=Pullheim Inc,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=exch ,DC=lan whenChanged: 20231207110720.0Z msExchRBACPolicyLink: CN=Default Role Assignment Policy,CN=Policies,CN=RBAC,CN =Pullheim Inc,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=exch,DC=l an homeMDB: CN=Mailbox Database 0458668364,CN=Databases,CN=Exchange Administrativ e Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Pullheim Inc,CN=Microso ft Exchange,CN=Services,CN=Configuration,DC=exch,DC=lan msExchArchiveDatabaseLink: CN=Mailbox Database 0458668364,CN=Databases,CN=Exch ange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Pullh eim Inc,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=exch,DC=lan uSNChanged: 9454 distinguishedName: CN=HealthMailboxb07af0bbc4664d4d941afe10a6834071,CN=Monitor ing Mailboxes,CN=Microsoft Exchange System Objects,DC=exch,DC=lan
> msExchHideFromAddressLists: TRUE I suppose this is the one we want to consider.