diff --git a/CHANGELOG.md b/CHANGELOG.md
index ed433d96f..b706c8059 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - Updated PULL_REQUEST_TEMPLATE.md to match DSC standard
 - SPAzureAccessControlServiceAppProxy
   - Added new resource to create Azure Access Control Service Application Proxy
+- SPExcelServiceApp
+  - Documentation update for SharePoint 2016/2019 deprecation.
+- SPInstallPrereqs
+  - Documentation update for SharePoint 2019 offline install parameters.
 - SPFarm
   - Added possibility to set application credential key.
 - SPOAppPrincipalMgmtServiceAppProxy
diff --git a/SharePointDsc/DSCResources/MSFT_SPExcelServiceApp/MSFT_SPExcelServiceApp.psm1 b/SharePointDsc/DSCResources/MSFT_SPExcelServiceApp/MSFT_SPExcelServiceApp.psm1
index 2733013f2..f984f47eb 100644
--- a/SharePointDsc/DSCResources/MSFT_SPExcelServiceApp/MSFT_SPExcelServiceApp.psm1
+++ b/SharePointDsc/DSCResources/MSFT_SPExcelServiceApp/MSFT_SPExcelServiceApp.psm1
@@ -319,7 +319,7 @@ function Set-TargetResource
     if ((Get-SPDscInstalledProductVersion).FileMajorPart -ne 15)
     {
         throw [Exception] ("Only SharePoint 2013 is supported to deploy Excel Services " + `
-                "service applications via DSC, as SharePoint 2016 and SharePoint 2019 are deprecated " + `
+                "service applications via DSC, as SharePoint 2016 and SharePoint 2019 have deprecated " + `
                 "this service. See " + `
                 "https://technet.microsoft.com/en-us/library/mt346112(v=office.16).aspx " + `
                 "for more info.")
@@ -577,7 +577,7 @@ function Test-TargetResource
     if ((Get-SPDscInstalledProductVersion).FileMajorPart -ne 15)
     {
         throw [Exception] ("Only SharePoint 2013 is supported to deploy Excel Services " + `
-                "service applications via DSC, as SharePoint 2016 and SharePoint 2019 are deprecated " + `
+                "service applications via DSC, as SharePoint 2016 and SharePoint 2019 have deprecated " + `
                 "this service. See " + `
                 "https://technet.microsoft.com/en-us/library/mt346112(v=office.16).aspx " + `
                 "for more info.")
diff --git a/SharePointDsc/DSCResources/MSFT_SPExcelServiceApp/Readme.md b/SharePointDsc/DSCResources/MSFT_SPExcelServiceApp/Readme.md
index e74e432a1..838468949 100644
--- a/SharePointDsc/DSCResources/MSFT_SPExcelServiceApp/Readme.md
+++ b/SharePointDsc/DSCResources/MSFT_SPExcelServiceApp/Readme.md
@@ -9,3 +9,8 @@ Excel Services Service Application.
 
 The default value for the Ensure parameter is Present. When not specifying this
 parameter, the service application is provisioned.
+
+Only SharePoint 2013 is supported to deploy Excel Services service applications via DSC,
+as SharePoint 2016 and SharePoint 2019 have deprecated this service. See
+[What's deprecated or removed from SharePoint Server 2016](https://technet.microsoft.com/en-us/library/mt346112(v=office.16).aspx)
+for more info.
diff --git a/SharePointDsc/DSCResources/MSFT_SPInstallPrereqs/MSFT_SPInstallPrereqs.schema.mof b/SharePointDsc/DSCResources/MSFT_SPInstallPrereqs/MSFT_SPInstallPrereqs.schema.mof
index 06cc528ab..cff318ff0 100644
--- a/SharePointDsc/DSCResources/MSFT_SPInstallPrereqs/MSFT_SPInstallPrereqs.schema.mof
+++ b/SharePointDsc/DSCResources/MSFT_SPInstallPrereqs/MSFT_SPInstallPrereqs.schema.mof
@@ -5,20 +5,20 @@ class MSFT_SPInstallPrereqs : OMI_BaseResource
     [Required, Description("The full path to prerequisiteinstaller.exe")] String InstallerPath;
     [Required, Description("Should the installer download prerequisites from the internet or not")] Boolean OnlineMode;
     [Write, Description("The path to the Windows Server Operating System SXS source files, for use in closed environments without access to Windows Update")] String SXSpath;
-    [Write, Description("The path to the installer for this prerequisite (SP2013 and SP2016)")] String SQLNCli;
+    [Write, Description("The path to the installer for this prerequisite (SP2013, SP2016 and SP2019)")] String SQLNCli;
     [Write, Description("The path to the installer for this prerequisite (SP2013 only)")] String PowerShell;
     [Write, Description("The path to the installer for this prerequisite (SP2013 only)")] String NETFX;
     [Write, Description("The path to the installer for this prerequisite (SP2013 only)")] String IDFX;
-    [Write, Description("The path to the installer for this prerequisite (SP2013 and SP2016)")] String Sync;
-    [Write, Description("The path to the installer for this prerequisite (SP2013 and SP2016)")] String AppFabric;
-    [Write, Description("The path to the installer for this prerequisite (SP2013 and SP2016)")] String IDFX11;
-    [Write, Description("The path to the installer for this prerequisite (SP2013 and SP2016)")] String MSIPCClient;
+    [Write, Description("The path to the installer for this prerequisite (SP2013, SP2016 and SP2019)")] String Sync;
+    [Write, Description("The path to the installer for this prerequisite (SP2013, SP2016 and SP2019)")] String AppFabric;
+    [Write, Description("The path to the installer for this prerequisite (SP2013, SP2016 and SP2019)")] String IDFX11;
+    [Write, Description("The path to the installer for this prerequisite (SP2013, SP2016 and SP2019)")] String MSIPCClient;
     [Write, Description("The path to the installer for this prerequisite (SP2013 only)")] String WCFDataServices;
     [Write, Description("The path to the installer for this prerequisite (SP2013 only)")] String KB2671763;
-    [Write, Description("The path to the installer for this prerequisite (SP2013 and SP2016)")] String WCFDataServices56;
-    [Write, Description("The path to the installer for this prerequisite (SP2016 only)")] String MSVCRT11;
+    [Write, Description("The path to the installer for this prerequisite (SP2013, SP2016 and SP2019)")] String WCFDataServices56;
+    [Write, Description("The path to the installer for this prerequisite (SP2016 and SP2019)")] String MSVCRT11;
     [Write, Description("The path to the installer for this prerequisite (SP2016 only)")] String MSVCRT14;
-    [Write, Description("The path to the installer for this prerequisite (SP2016 only)")] String KB3092423;
+    [Write, Description("The path to the installer for this prerequisite (SP2016 and SP2019)")] String KB3092423;
     [Write, Description("The path to the installer for this prerequisite (SP2016 only)")] String ODBC;
     [Write, Description("The path to the installer for this prerequisite (SP2016 only)")] String DotNetFx;
     [Write, Description("The path to the installer for this prerequisite (SP2019 only)")] String DotNet472;