diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13e1341e8..cb72a82f6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - The private function `Import-SQLPSModule` was replaced throughout with
     the public command `Import-SqlDscPreferredModule` ([issue #1848](https://github.com/dsccommunity/SqlServerDsc/issues/1848)).
 
+### Fixed
+
+- `Assert-SetupActionProperties`
+  - Now throws an exception if the setup action is `Install` and the feature
+    analysis services is specified without the parameter `ASSysAdminAccounts`
+    ([issue #1845](https://github.com/dsccommunity/SqlServerDsc/issues/1845)).
+  - Now throws an exception if the setup action is `Install` and the feature
+    database engine is specified without the parameter `SqlSysAdminAccounts`.
+- `Invoke-SetupAction`
+  - The parameter `SqlSysAdminAccounts` is no longer mandatory to allow
+    installation where the database engine is not installed.
+- `Install-SqlDscServer`
+  - The parameter `SqlSysAdminAccounts` is no longer mandatory to allow
+    installation where the database engine is not installed.
+
 ## [16.1.0] - 2023-02-28
 
 ### Removed
diff --git a/source/Private/Assert-SetupActionProperties.ps1 b/source/Private/Assert-SetupActionProperties.ps1
index b2d95d6e5..a39445c66 100644
--- a/source/Private/Assert-SetupActionProperties.ps1
+++ b/source/Private/Assert-SetupActionProperties.ps1
@@ -187,4 +187,21 @@ function Assert-SetupActionProperties
             )
         }
     }
+
+    if ($SetupAction -in ('Install'))
+    {
+        if ($Property.ContainsKey('Features') -and $Property.Features -contains 'SQLENGINE')
+        {
+            Assert-BoundParameter -BoundParameterList $Property -RequiredParameter @(
+                'SqlSysAdminAccounts'
+            )
+        }
+
+        if ($Property.ContainsKey('Features') -and $Property.Features -contains 'AS')
+        {
+            Assert-BoundParameter -BoundParameterList $Property -RequiredParameter @(
+                'ASSysAdminAccounts'
+            )
+        }
+    }
 }
diff --git a/source/Private/Invoke-SetupAction.ps1 b/source/Private/Invoke-SetupAction.ps1
index ea797540c..aacfc1732 100644
--- a/source/Private/Invoke-SetupAction.ps1
+++ b/source/Private/Invoke-SetupAction.ps1
@@ -1031,7 +1031,7 @@ function Invoke-SetupAction
         [System.String]
         $SqlSvcStartupType,
 
-        [Parameter(ParameterSetName = 'Install', Mandatory = $true)]
+        [Parameter(ParameterSetName = 'Install')]
         [Parameter(ParameterSetName = 'CompleteImage')]
         [Parameter(ParameterSetName = 'RebuildDatabase', Mandatory = $true)]
         [Parameter(ParameterSetName = 'InstallFailoverCluster', Mandatory = $true)]
diff --git a/source/Public/Install-SqlDscServer.ps1 b/source/Public/Install-SqlDscServer.ps1
index 03785e2b1..fe724f020 100644
--- a/source/Public/Install-SqlDscServer.ps1
+++ b/source/Public/Install-SqlDscServer.ps1
@@ -854,7 +854,7 @@ function Install-SqlDscServer
         [System.String]
         $SqlSvcStartupType,
 
-        [Parameter(ParameterSetName = 'Install', Mandatory = $true)]
+        [Parameter(ParameterSetName = 'Install')]
         [Parameter(ParameterSetName = 'InstallFailoverCluster', Mandatory = $true)]
         [Parameter(ParameterSetName = 'InstallRole')]
         [System.String[]]
diff --git a/tests/Unit/Private/Assert-SetupActionProperties.Tests.ps1 b/tests/Unit/Private/Assert-SetupActionProperties.Tests.ps1
index 75160d0db..33e33a7e8 100644
--- a/tests/Unit/Private/Assert-SetupActionProperties.Tests.ps1
+++ b/tests/Unit/Private/Assert-SetupActionProperties.Tests.ps1
@@ -488,8 +488,18 @@ Describe 'Assert-SetupActionProperties' -Tag 'Private' {
             MockMissingParameterName = 'RSSvcAccount'
             MockFeature = 'RS'
         }
+        @{
+            MockSetupAction = 'Install'
+            MockFeature = 'AS'
+            MockMissingParameterName = 'ASSysAdminAccounts'
+        }
+        @{
+            MockSetupAction = 'Install'
+            MockFeature = 'SQLENGINE'
+            MockMissingParameterName = 'SqlSysAdminAccounts'
+        }
     ) {
-        It 'Should not throw an exception' {
+        It 'Should throw an exception' {
             InModuleScope -Parameters $_ -ScriptBlock {
                 {
                     Assert-SetupActionProperties -Property @{
@@ -508,7 +518,7 @@ Describe 'Assert-SetupActionProperties' -Tag 'Private' {
             MockSetupAction = 'CompleteFailoverCluster'
         }
     ) {
-        It 'Should not throw an exception' {
+        It 'Should throw an exception' {
             InModuleScope -Parameters $_ -ScriptBlock {
                 {
                     Assert-SetupActionProperties -Property @{
@@ -524,7 +534,7 @@ Describe 'Assert-SetupActionProperties' -Tag 'Private' {
             MockSetupAction = 'AddNode'
         }
     ) {
-        It 'Should not throw an exception' {
+        It 'Should throw an exception' {
             InModuleScope -Parameters $_ -ScriptBlock {
                 {
                     Assert-SetupActionProperties -Property @{
diff --git a/tests/Unit/Private/Invoke-SetupAction.Tests.ps1 b/tests/Unit/Private/Invoke-SetupAction.Tests.ps1
index 44a04161d..2729a8315 100644
--- a/tests/Unit/Private/Invoke-SetupAction.Tests.ps1
+++ b/tests/Unit/Private/Invoke-SetupAction.Tests.ps1
@@ -52,7 +52,7 @@ Describe 'Invoke-SetupAction' -Tag 'Private' {
         @{
             MockParameterSetName = 'Install'
             # cSpell: disable-next
-            MockExpectedParameters = '-Install -AcceptLicensingTerms -MediaPath <string> -InstanceName <string> -Features <string[]> -SqlSysAdminAccounts <string[]> [-SuppressPrivacyStatementNotice] [-IAcknowledgeEntCalLimits] [-Enu] [-UpdateEnabled] [-UpdateSource <string>] [-InstallSharedDir <string>] [-InstallSharedWowDir <string>] [-InstanceDir <string>] [-InstanceId <string>] [-PBEngSvcAccount <string>] [-PBEngSvcPassword <securestring>] [-PBEngSvcStartupType <string>] [-PBDMSSvcAccount <string>] [-PBDMSSvcPassword <securestring>] [-PBDMSSvcStartupType <string>] [-PBStartPortRange <ushort>] [-PBEndPortRange <ushort>] [-PBScaleOut] [-ProductKey <string>] [-AgtSvcAccount <string>] [-AgtSvcPassword <securestring>] [-AgtSvcStartupType <string>] [-ASBackupDir <string>] [-ASCollation <string>] [-ASConfigDir <string>] [-ASDataDir <string>] [-ASLogDir <string>] [-ASTempDir <string>] [-ASServerMode <string>] [-ASSvcAccount <string>] [-ASSvcPassword <securestring>] [-ASSvcStartupType <string>] [-ASSysAdminAccounts <string[]>] [-ASProviderMSOLAP] [-BrowserSvcStartupType <string>] [-EnableRanU] [-InstallSqlDataDir <string>] [-SqlBackupDir <string>] [-SecurityMode <string>] [-SAPwd <securestring>] [-SqlCollation <string>] [-SqlSvcAccount <string>] [-SqlSvcPassword <securestring>] [-SqlSvcStartupType <string>] [-SqlTempDbDir <string>] [-SqlTempDbLogDir <string>] [-SqlTempDbFileCount <ushort>] [-SqlTempDbFileSize <ushort>] [-SqlTempDbFileGrowth <ushort>] [-SqlTempDbLogFileSize <ushort>] [-SqlTempDbLogFileGrowth <ushort>] [-SqlUserDbDir <string>] [-SqlSvcInstantFileInit] [-SqlUserDbLogDir <string>] [-SqlMaxDop <ushort>] [-UseSqlRecommendedMemoryLimits] [-SqlMinMemory <uint>] [-SqlMaxMemory <uint>] [-FileStreamLevel <ushort>] [-FileStreamShareName <string>] [-ISSvcAccount <string>] [-ISSvcPassword <securestring>] [-ISSvcStartupType <string>] [-NpEnabled] [-TcpEnabled] [-RsInstallMode <string>] [-RSSvcAccount <string>] [-RSSvcPassword <securestring>] [-RSSvcStartupType <string>] [-MPYCacheDirectory <string>] [-MRCacheDirectory <string>] [-SqlInstJava] [-SqlJavaDir <string>] [-AzureSubscriptionId <string>] [-AzureResourceGroup <string>] [-AzureRegion <string>] [-AzureTenantId <string>] [-AzureServicePrincipal <string>] [-AzureServicePrincipalSecret <securestring>] [-AzureArcProxy <string>] [-SkipRules <string[]>] [-ProductCoveredBySA] [-Timeout <uint>] [-Force] [-WhatIf] [-Confirm] [<CommonParameters>]'
+            MockExpectedParameters = '-Install -AcceptLicensingTerms -MediaPath <string> -InstanceName <string> -Features <string[]> [-SuppressPrivacyStatementNotice] [-IAcknowledgeEntCalLimits] [-Enu] [-UpdateEnabled] [-UpdateSource <string>] [-InstallSharedDir <string>] [-InstallSharedWowDir <string>] [-InstanceDir <string>] [-InstanceId <string>] [-PBEngSvcAccount <string>] [-PBEngSvcPassword <securestring>] [-PBEngSvcStartupType <string>] [-PBDMSSvcAccount <string>] [-PBDMSSvcPassword <securestring>] [-PBDMSSvcStartupType <string>] [-PBStartPortRange <ushort>] [-PBEndPortRange <ushort>] [-PBScaleOut] [-ProductKey <string>] [-AgtSvcAccount <string>] [-AgtSvcPassword <securestring>] [-AgtSvcStartupType <string>] [-ASBackupDir <string>] [-ASCollation <string>] [-ASConfigDir <string>] [-ASDataDir <string>] [-ASLogDir <string>] [-ASTempDir <string>] [-ASServerMode <string>] [-ASSvcAccount <string>] [-ASSvcPassword <securestring>] [-ASSvcStartupType <string>] [-ASSysAdminAccounts <string[]>] [-ASProviderMSOLAP] [-BrowserSvcStartupType <string>] [-EnableRanU] [-InstallSqlDataDir <string>] [-SqlBackupDir <string>] [-SecurityMode <string>] [-SAPwd <securestring>] [-SqlCollation <string>] [-SqlSvcAccount <string>] [-SqlSvcPassword <securestring>] [-SqlSvcStartupType <string>] [-SqlSysAdminAccounts <string[]>] [-SqlTempDbDir <string>] [-SqlTempDbLogDir <string>] [-SqlTempDbFileCount <ushort>] [-SqlTempDbFileSize <ushort>] [-SqlTempDbFileGrowth <ushort>] [-SqlTempDbLogFileSize <ushort>] [-SqlTempDbLogFileGrowth <ushort>] [-SqlUserDbDir <string>] [-SqlSvcInstantFileInit] [-SqlUserDbLogDir <string>] [-SqlMaxDop <ushort>] [-UseSqlRecommendedMemoryLimits] [-SqlMinMemory <uint>] [-SqlMaxMemory <uint>] [-FileStreamLevel <ushort>] [-FileStreamShareName <string>] [-ISSvcAccount <string>] [-ISSvcPassword <securestring>] [-ISSvcStartupType <string>] [-NpEnabled] [-TcpEnabled] [-RsInstallMode <string>] [-RSSvcAccount <string>] [-RSSvcPassword <securestring>] [-RSSvcStartupType <string>] [-MPYCacheDirectory <string>] [-MRCacheDirectory <string>] [-SqlInstJava] [-SqlJavaDir <string>] [-AzureSubscriptionId <string>] [-AzureResourceGroup <string>] [-AzureRegion <string>] [-AzureTenantId <string>] [-AzureServicePrincipal <string>] [-AzureServicePrincipalSecret <securestring>] [-AzureArcProxy <string>] [-SkipRules <string[]>] [-ProductCoveredBySA] [-Timeout <uint>] [-Force] [-WhatIf] [-Confirm] [<CommonParameters>]'
         }
         @{
             MockParameterSetName = 'InstallRole'
diff --git a/tests/Unit/Public/Install-SqlDscServer.Tests.ps1 b/tests/Unit/Public/Install-SqlDscServer.Tests.ps1
index 3779a5480..152a4afb5 100644
--- a/tests/Unit/Public/Install-SqlDscServer.Tests.ps1
+++ b/tests/Unit/Public/Install-SqlDscServer.Tests.ps1
@@ -52,7 +52,7 @@ Describe 'Install-SqlDscServer' -Tag 'Public' {
         @{
             MockParameterSetName = 'Install'
             # cSpell: disable-next
-            MockExpectedParameters = '-Install -AcceptLicensingTerms -MediaPath <string> -InstanceName <string> -Features <string[]> -SqlSysAdminAccounts <string[]> [-SuppressPrivacyStatementNotice] [-IAcknowledgeEntCalLimits] [-Enu] [-UpdateEnabled] [-UpdateSource <string>] [-InstallSharedDir <string>] [-InstallSharedWowDir <string>] [-InstanceDir <string>] [-InstanceId <string>] [-PBEngSvcAccount <string>] [-PBEngSvcPassword <securestring>] [-PBEngSvcStartupType <string>] [-PBDMSSvcAccount <string>] [-PBDMSSvcPassword <securestring>] [-PBDMSSvcStartupType <string>] [-PBStartPortRange <ushort>] [-PBEndPortRange <ushort>] [-PBScaleOut] [-ProductKey <string>] [-AgtSvcAccount <string>] [-AgtSvcPassword <securestring>] [-AgtSvcStartupType <string>] [-ASBackupDir <string>] [-ASCollation <string>] [-ASConfigDir <string>] [-ASDataDir <string>] [-ASLogDir <string>] [-ASTempDir <string>] [-ASServerMode <string>] [-ASSvcAccount <string>] [-ASSvcPassword <securestring>] [-ASSvcStartupType <string>] [-ASSysAdminAccounts <string[]>] [-ASProviderMSOLAP] [-BrowserSvcStartupType <string>] [-EnableRanU] [-InstallSqlDataDir <string>] [-SqlBackupDir <string>] [-SecurityMode <string>] [-SAPwd <securestring>] [-SqlCollation <string>] [-SqlSvcAccount <string>] [-SqlSvcPassword <securestring>] [-SqlSvcStartupType <string>] [-SqlTempDbDir <string>] [-SqlTempDbLogDir <string>] [-SqlTempDbFileCount <ushort>] [-SqlTempDbFileSize <ushort>] [-SqlTempDbFileGrowth <ushort>] [-SqlTempDbLogFileSize <ushort>] [-SqlTempDbLogFileGrowth <ushort>] [-SqlUserDbDir <string>] [-SqlSvcInstantFileInit] [-SqlUserDbLogDir <string>] [-SqlMaxDop <ushort>] [-UseSqlRecommendedMemoryLimits] [-SqlMinMemory <uint>] [-SqlMaxMemory <uint>] [-FileStreamLevel <ushort>] [-FileStreamShareName <string>] [-ISSvcAccount <string>] [-ISSvcPassword <securestring>] [-ISSvcStartupType <string>] [-NpEnabled] [-TcpEnabled] [-RsInstallMode <string>] [-RSSvcAccount <string>] [-RSSvcPassword <securestring>] [-RSSvcStartupType <string>] [-MPYCacheDirectory <string>] [-MRCacheDirectory <string>] [-SqlInstJava] [-SqlJavaDir <string>] [-AzureSubscriptionId <string>] [-AzureResourceGroup <string>] [-AzureRegion <string>] [-AzureTenantId <string>] [-AzureServicePrincipal <string>] [-AzureServicePrincipalSecret <securestring>] [-AzureArcProxy <string>] [-SkipRules <string[]>] [-ProductCoveredBySA] [-Timeout <uint>] [-Force] [-WhatIf] [-Confirm] [<CommonParameters>]'
+            MockExpectedParameters = '-Install -AcceptLicensingTerms -MediaPath <string> -InstanceName <string> -Features <string[]> [-SuppressPrivacyStatementNotice] [-IAcknowledgeEntCalLimits] [-Enu] [-UpdateEnabled] [-UpdateSource <string>] [-InstallSharedDir <string>] [-InstallSharedWowDir <string>] [-InstanceDir <string>] [-InstanceId <string>] [-PBEngSvcAccount <string>] [-PBEngSvcPassword <securestring>] [-PBEngSvcStartupType <string>] [-PBDMSSvcAccount <string>] [-PBDMSSvcPassword <securestring>] [-PBDMSSvcStartupType <string>] [-PBStartPortRange <ushort>] [-PBEndPortRange <ushort>] [-PBScaleOut] [-ProductKey <string>] [-AgtSvcAccount <string>] [-AgtSvcPassword <securestring>] [-AgtSvcStartupType <string>] [-ASBackupDir <string>] [-ASCollation <string>] [-ASConfigDir <string>] [-ASDataDir <string>] [-ASLogDir <string>] [-ASTempDir <string>] [-ASServerMode <string>] [-ASSvcAccount <string>] [-ASSvcPassword <securestring>] [-ASSvcStartupType <string>] [-ASSysAdminAccounts <string[]>] [-ASProviderMSOLAP] [-BrowserSvcStartupType <string>] [-EnableRanU] [-InstallSqlDataDir <string>] [-SqlBackupDir <string>] [-SecurityMode <string>] [-SAPwd <securestring>] [-SqlCollation <string>] [-SqlSvcAccount <string>] [-SqlSvcPassword <securestring>] [-SqlSvcStartupType <string>] [-SqlSysAdminAccounts <string[]>] [-SqlTempDbDir <string>] [-SqlTempDbLogDir <string>] [-SqlTempDbFileCount <ushort>] [-SqlTempDbFileSize <ushort>] [-SqlTempDbFileGrowth <ushort>] [-SqlTempDbLogFileSize <ushort>] [-SqlTempDbLogFileGrowth <ushort>] [-SqlUserDbDir <string>] [-SqlSvcInstantFileInit] [-SqlUserDbLogDir <string>] [-SqlMaxDop <ushort>] [-UseSqlRecommendedMemoryLimits] [-SqlMinMemory <uint>] [-SqlMaxMemory <uint>] [-FileStreamLevel <ushort>] [-FileStreamShareName <string>] [-ISSvcAccount <string>] [-ISSvcPassword <securestring>] [-ISSvcStartupType <string>] [-NpEnabled] [-TcpEnabled] [-RsInstallMode <string>] [-RSSvcAccount <string>] [-RSSvcPassword <securestring>] [-RSSvcStartupType <string>] [-MPYCacheDirectory <string>] [-MRCacheDirectory <string>] [-SqlInstJava] [-SqlJavaDir <string>] [-AzureSubscriptionId <string>] [-AzureResourceGroup <string>] [-AzureRegion <string>] [-AzureTenantId <string>] [-AzureServicePrincipal <string>] [-AzureServicePrincipalSecret <securestring>] [-AzureArcProxy <string>] [-SkipRules <string[]>] [-ProductCoveredBySA] [-Timeout <uint>] [-Force] [-WhatIf] [-Confirm] [<CommonParameters>]'
         }
         @{
             MockParameterSetName = 'InstallRole'