diff --git a/source/Private/Get-RequiredModule.ps1 b/source/Private/Get-RequiredModule.ps1
index fb426f5..b5b1c8d 100644
--- a/source/Private/Get-RequiredModule.ps1
+++ b/source/Private/Get-RequiredModule.ps1
@@ -1,15 +1,36 @@
 function Get-RequiredModule {
-    return @(
-        @{ ModuleName = "ExchangeOnlineManagement"; RequiredVersion = "3.3.0" },
-        @{ ModuleName = "AzureAD"; RequiredVersion = "2.0.2.182" },
-        @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Authentication" },
-        @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Users" },
-        @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Groups" },
-        @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "DirectoryObjects" },
-        @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Domains" },
-        @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Reports" },
-        @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Mail" },
-        @{ ModuleName = "Microsoft.Online.SharePoint.PowerShell"; RequiredVersion = "16.0.24009.12000" },
-        @{ ModuleName = "MicrosoftTeams"; RequiredVersion = "5.5.0" }
+    [CmdletBinding(DefaultParameterSetName = 'AuditFunction')]
+    param (
+        [Parameter(Mandatory = $true, ParameterSetName = 'AuditFunction')]
+        [switch]$AuditFunction,
+
+        [Parameter(Mandatory = $true, ParameterSetName = 'SyncFunction')]
+        [switch]$SyncFunction
     )
+
+    switch ($PSCmdlet.ParameterSetName) {
+        'AuditFunction' {
+            return @(
+                @{ ModuleName = "ExchangeOnlineManagement"; RequiredVersion = "3.3.0" },
+                @{ ModuleName = "AzureAD"; RequiredVersion = "2.0.2.182" },
+                @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Authentication" },
+                @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Users" },
+                @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Groups" },
+                @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "DirectoryObjects" },
+                @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Domains" },
+                @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Reports" },
+                @{ ModuleName = "Microsoft.Graph"; RequiredVersion = "2.4.0"; SubModuleName = "Mail" },
+                @{ ModuleName = "Microsoft.Online.SharePoint.PowerShell"; RequiredVersion = "16.0.24009.12000" },
+                @{ ModuleName = "MicrosoftTeams"; RequiredVersion = "5.5.0" }
+            )
+        }
+        'SyncFunction' {
+            return @(
+                @{ ModuleName = "ImportExcel"; RequiredVersion = "7.8.9" }
+            )
+        }
+        default {
+            throw "Please specify either -AuditFunction or -SyncFunction switch."
+        }
+    }
 }
diff --git a/source/Public/Invoke-M365SecurityAudit.ps1 b/source/Public/Invoke-M365SecurityAudit.ps1
index 1b7632c..a9b0046 100644
--- a/source/Public/Invoke-M365SecurityAudit.ps1
+++ b/source/Public/Invoke-M365SecurityAudit.ps1
@@ -65,7 +65,7 @@ function Invoke-M365SecurityAudit {
         }
         # Ensure required modules are installed
         if (!($NoModuleCheck)) {
-            $requiredModules = Get-RequiredModule
+            $requiredModules = Get-RequiredModule -AuditFunction
             foreach ($module in $requiredModules) {
                 Assert-ModuleAvailability -ModuleName $module.ModuleName -RequiredVersion $module.RequiredVersion -SubModuleName $module.SubModuleName
             }
diff --git a/source/Public/Sync-CISExcelAndCsvData.ps1 b/source/Public/Sync-CISExcelAndCsvData.ps1
index 22d84b4..e07b725 100644
--- a/source/Public/Sync-CISExcelAndCsvData.ps1
+++ b/source/Public/Sync-CISExcelAndCsvData.ps1
@@ -49,6 +49,12 @@ function Sync-CISExcelAndCsvData {
     )
 
     process {
+        # Verify ImportExcel module is available
+        $requiredModules = Get-RequiredModule -SyncFunction
+        foreach ($module in $requiredModules) {
+            Assert-ModuleAvailability -ModuleName $module.ModuleName -RequiredVersion $module.RequiredVersion -SubModuleName $module.SubModuleName
+        }
+
         # Merge Excel and CSV data
         $mergedData = Merge-CISExcelAndCsvData -ExcelPath $ExcelPath -WorksheetName $WorksheetName -CsvPath $CsvPath
 
@@ -61,3 +67,4 @@ function Sync-CISExcelAndCsvData {
         }
     }
 }
+