diff --git a/module/Entra/Microsoft.Entra/Groups/Update-EntraGroup.ps1 b/module/Entra/Microsoft.Entra/Groups/Update-EntraGroup.ps1
new file mode 100644
index 0000000000..836cf45149
--- /dev/null
+++ b/module/Entra/Microsoft.Entra/Groups/Update-EntraGroup.ps1
@@ -0,0 +1,101 @@
+# ------------------------------------------------------------------------------ 
+#  Copyright (c) Microsoft Corporation.  All Rights Reserved.  
+#  Licensed under the MIT License.  See License in the project root for license information. 
+# ------------------------------------------------------------------------------ 
+
+function Update-EntraGroup {
+    [CmdletBinding(SupportsShouldProcess, ConfirmImpact = 'Medium', DefaultParameterSetName = 'Default')]
+    param (
+        [Parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, HelpMessage = "The unique identifier for the group, such as its object ID.")]
+        [Alias("ObjectId", "Id")]
+        [ValidateNotNullOrEmpty()]
+        [string]$GroupId,
+
+        [Parameter(HelpMessage = "The description of the group.")]
+        [string]$Description,
+
+        [Parameter(HelpMessage = "The display name of the group.")]
+        [string]$DisplayName,
+
+        [Parameter(HelpMessage = "Defines the group type and membership. Possible values: 'Unified' (Microsoft 365 group) or 'DynamicMembership'. If not 'Unified', the group is a security or distribution group.")]
+        [string[]]$GroupTypes,
+
+        [Parameter(HelpMessage = "Specifies whether the group is mail-enabled.")]
+        [bool]$MailEnabled,
+
+        [Parameter(HelpMessage = "The mail nickname for the group.")]
+        [string]$MailNickname,
+
+        [Parameter(HelpMessage = "Specifies whether the group is a security group.")]
+        [bool]$SecurityEnabled,
+
+        [Parameter(HelpMessage = "Indicates if the group can be assigned to a Microsoft Entra role (only for security groups). This setting is fixed at creation and cannot be changed.")]
+        [bool]$IsAssignableToRole,
+
+        [Parameter(HelpMessage = "A list of SMTP proxy addresses for the group, including the primary SMTP address.")]
+        [string[]]$ProxyAddresses,
+
+        [Parameter(HelpMessage = "Specifies whether the group is visible in the address list.")]
+        [string]$Visibility,
+
+        [Parameter(Mandatory = $false, HelpMessage = "A hashtable of additional group properties to update.")]
+        [Alias("BodyParameter", "Body", "BodyParameters")]
+        [hashtable]$AdditionalProperties = @{}
+    )
+
+    begin {
+
+        # Ensure connection to Microsoft Entra
+        if (-not (Get-EntraContext)) {
+            $errorMessage = "Not connected to Microsoft Graph. Use 'Connect-Entra -Scopes Group.ReadWrite.All' to authenticate."
+            Write-Error -Message $errorMessage -ErrorAction Stop
+            return
+        }
+        
+    }
+
+    process {
+        $customHeaders = New-EntraCustomHeaders -Command $MyInvocation.MyCommand
+
+        # Microsoft Graph API URL for updating group properties
+        $graphUri = "https://graph.microsoft.com/v1.0/groups/$GroupId"
+
+        # Initialize hashtable for group properties
+        $GroupProperties = @{}
+
+        $CommonParameters = @("Verbose", "Debug", "WarningAction", "WarningVariable", "ErrorAction", "ErrorVariable", "OutVariable", "OutBuffer", "WhatIf", "Confirm")
+
+        # Merge individual parameters into GroupProperties
+        foreach ($param in $PSBoundParameters.Keys) {
+            if ($param -ne "GroupId" -and $param -ne "AdditionalProperties" -and $CommonParameters -notcontains $param) {
+                $GroupProperties[$param] = $PSBoundParameters[$param]
+            }
+        }
+
+        # Merge AdditionalProperties if provided
+        foreach ($key in $AdditionalProperties.Keys) {
+            $GroupProperties[$key] = $AdditionalProperties[$key]
+        }
+
+        if ($GroupProperties.Count -eq 0) {
+            Write-Warning "No properties provided for update. Exiting."
+            return
+        }
+
+        # Convert final update properties to JSON
+        $bodyJson = $GroupProperties | ConvertTo-Json -Depth 2
+
+    
+        if ($PSCmdlet.ShouldProcess("Group with ID '$GroupId'", "Update the following properties: $($GroupProperties.Keys -join ', ')")) {
+            try {
+                # Invoke Microsoft Graph API Request
+                Invoke-MgGraphRequest -Uri $graphUri -Method PATCH -Body $bodyJson -Headers $customHeaders
+                Write-Verbose "Properties for group $GroupId updated successfully. Updated properties: $($GroupProperties | Out-String)"
+            }
+            catch {
+                Write-Debug "Error Details: $_"
+                Write-Error "Failed to update group properties: $_"
+            }
+        }
+    }
+}
diff --git a/test/Entra/Groups/Update-EntraGroup.Tests.ps1 b/test/Entra/Groups/Update-EntraGroup.Tests.ps1
new file mode 100644
index 0000000000..3af4a266a6
--- /dev/null
+++ b/test/Entra/Groups/Update-EntraGroup.Tests.ps1
@@ -0,0 +1,65 @@
+# ------------------------------------------------------------------------------
+#  Copyright (c) Microsoft Corporation.  All Rights Reserved.  Licensed under the MIT License.  See License in the project root for license information.
+# ------------------------------------------------------------------------------
+
+BeforeAll {  
+    if((Get-Module -Name Microsoft.Entra.Groups) -eq $null){
+        Import-Module Microsoft.Entra.Groups        
+    }
+    Import-Module (Join-Path $PSScriptRoot "..\..\Common-Functions.ps1") -Force
+
+    Mock -CommandName Invoke-MgGraphRequest -MockWith {} -ModuleName Microsoft.Entra.Groups
+    Mock -CommandName Get-EntraContext -MockWith { @{Scopes = @("Group.ReadWrite.All")} } -ModuleName Microsoft.Entra.Groups
+}
+  
+Describe "Update-EntraGroup" {
+    Context "Test for Update-EntraGroup" {
+        It "Should return empty object" {
+            $result = Update-EntraGroup -GroupId bbbbbbbb-1111-2222-3333-cccccccccccc -DisplayName "demo" -MailEnabled $false -SecurityEnabled $true -MailNickName "demoNickname" -Description "test"
+            $result | Should -BeNullOrEmpty
+
+            Should -Invoke -CommandName Invoke-MgGraphRequest -ModuleName Microsoft.Entra.Groups -Times 1
+        }
+        It "Should execute successfully with Alias" {
+            $result = Update-EntraGroup -Id bbbbbbbb-1111-2222-3333-cccccccccccc -DisplayName "demo" -MailEnabled $false -SecurityEnabled $true -MailNickName "demoNickname" -Description "test"
+            $result | Should -BeNullOrEmpty
+
+            Should -Invoke -CommandName Invoke-MgGraphRequest -ModuleName Microsoft.Entra.Groups -Times 1
+        }
+        It "Should fail when GroupId is invalid" {
+            { Update-EntraGroup -GroupId "" } | Should -Throw "Cannot validate argument on parameter 'GroupId'. The argument is null or empty. Provide an argument that is not null or empty, and then try the command again."
+        }
+        It "Should fail when GroupId is empty" {
+            { Update-EntraGroup -GroupId } | Should -Throw "Missing an argument for parameter 'GroupId'*"
+        }
+        It "Should not execute Invoke-MgGraphRequest with WhatIf parameter" {
+            Update-EntraGroup -GroupId bbbbbbbb-1111-2222-3333-cccccccccccc -DisplayName "demo" -WhatIf
+            Should -Invoke -CommandName Invoke-MgGraphRequest -ModuleName Microsoft.Entra.Groups -Times 0
+        }
+        It "Should contain 'User-Agent' header" {
+            $userAgentHeaderValue = "PowerShell/$psVersion EntraPowershell/$entraVersion Update-EntraGroup"
+
+            Update-EntraGroup -Id bbbbbbbb-1111-2222-3333-cccccccccccc -DisplayName "demo"
+
+            $userAgentHeaderValue = "PowerShell/$psVersion EntraPowershell/$entraVersion Update-EntraGroup"
+            Should -Invoke -CommandName Invoke-MgGraphRequest -ModuleName Microsoft.Entra.Groups -Times 1 -ParameterFilter {
+                $Headers.'User-Agent' | Should -Be $userAgentHeaderValue
+                $true
+            }
+        }
+        It "Should execute successfully without throwing an error " {
+            # Disable confirmation prompts       
+            $originalDebugPreference = $DebugPreference
+            $DebugPreference = 'Continue'
+    
+            try {
+                # Act & Assert: Ensure the function doesn't throw an exception
+                { Update-EntraGroup -Id bbbbbbbb-1111-2222-3333-cccccccccccc } | Should -Not -Throw
+            } finally {
+                # Restore original confirmation preference            
+                $DebugPreference = $originalDebugPreference        
+            }
+        }   
+    }
+}
+