diff --git a/Connect MS Graph with Certificate-Automate Azure app registration/ConnectMSGraphCertificate.ps1 b/Connect MS Graph with Certificate-Automate Azure app registration/ConnectMSGraphCertificate.ps1
new file mode 100644
index 0000000..c389255
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+++ b/Connect MS Graph with Certificate-Automate Azure app registration/ConnectMSGraphCertificate.ps1	
@@ -0,0 +1,444 @@
+<#
+=============================================================================================
+Name:           Connect to MS Graph PowerShell using Certificate
+Description:    This script automates Azure app registration
+For detailed Script execution: https://blog.admindroid.com/connect-to-microsoft-graph-powershell-using-certificate/
+============================================================================================
+#>
+param (
+    $TenantID =$null,
+    $ClientID = $null,
+    $CertificateThumbprint = $null
+) 
+Function ConnectMgGraphModule
+{
+    $MsGraphModule =  Get-Module Microsoft.Graph -ListAvailable
+    if($MsGraphModule -eq $null)
+    { 
+        Write-host "Important: Microsoft graph module is unavailable. It is mandatory to have this module installed in the system to run the script successfully." 
+        $confirm = Read-Host Are you sure you want to install Microsoft graph module? [Y] Yes [N] No  
+        if($confirm -match "[yY]") 
+        { 
+            Write-host "Installing Microsoft graph module..."
+            Install-Module Microsoft.Graph -Scope CurrentUser
+            Write-host "Microsoft graph module is installed in this machine successfully" -ForegroundColor Magenta 
+        } 
+        else
+        { 
+            Write-host "Exiting. `nNote: Microsoft graph module must be available in your system to run the script" -ForegroundColor Red
+            Exit 
+        } 
+    }
+    Connect-MgGraph -Scopes "Application.ReadWrite.All,Directory.ReadWrite.All"  -ErrorAction SilentlyContinue -Errorvariable ConnectionError |Out-Null
+    if($ConnectionError -ne $null)
+    {
+        Write-Host "$ConnectionError" -Foregroundcolor Red
+        Exit
+    }
+    Write-Host "Microsoft Graph Powershell module is connected successfully" -ForegroundColor Green
+    $Script:TenantID = (Get-MgOrganization).Id
+}
+function RegisterApplication
+{
+    Write-Progress -Activity "Registering an application"
+    while(1)
+    {
+        $Script:AppName = Read-Host "`nEnter a name for the new App"
+        if($AppName -eq "")
+        {
+            Write-Host "You didn't enter any name. Please provide an app name to continue." -ForegroundColor Red
+            continue
+        }
+        break
+    }
+    $Script:RedirectURI = "https://login.microsoftonline.com/common/oauth2/nativeclient"
+    $params = @{
+        DisplayName = $AppName
+        SignInAudience="AzureADMyOrg"
+        PublicClient=@{
+                RedirectUris = "$RedirectURI"
+        }
+        RequiredResourceAccess = @(
+            @{
+                ResourceAppId = "00000003-0000-0000-c000-000000000000" #  Microsoft Graph Resource ID
+                ResourceAccess = @(
+                    @{
+                        Id = "7ab1d382-f21e-4acd-a863-ba3e13f7da61" #Directory.Read.All -> Id
+                        Type = "Role"                               #Role -> Application permission
+                     }
+                    )
+                }
+            )
+    }
+    try{
+        $Script:App = New-MgApplication -BodyParameter $params 
+    }
+    catch
+    {
+        Write-Host $_.Exception.Message -ForegroundColor Red
+        CloseConnection
+    }
+    Write-Host "`nApp created successfully" -ForegroundColor Green
+    $Script:APPObjectID = $App.Id
+    $Script:APPID = $App.AppId
+}
+function CertificateCreation
+{
+    Write-Progress -Activity "Creating certificate"
+    $Script:CertificateName = "$AppName-Keycertifcate"   
+    $Script:path = "Cert:\CurrentUser\My\"
+    $Script:CertificatePath = Get-ChildItem -Path $path
+    $Script:Subject = "CN=$CertificateName"
+    try
+    {
+        $Script:Certificate = New-SelfSignedCertificate -Subject $Subject -CertStoreLocation "$path" -KeyExportPolicy Exportable -KeySpec Signature -KeyLength 2048 -HashAlgorithm SHA256 
+    }
+    catch
+    {
+        Write-Host $_.Exception.Message -ForegroundColor Red
+        CloseConnection
+    }
+    Write-Host "`nCertificate created successfully" -ForegroundColor Green
+}
+Function ImportCertificate
+{
+    Write-Progress -Activity "Importing certificate"
+    $UploadCertificate = Read-Host "Enter the certificate path(For example: C:\Users\Admin\user.cer)"
+    try
+    {
+        $Script:Certificate = Import-Certificate -FilePath "$UploadCertificate" -CertStoreLocation "Cert:\CurrentUser\My" 
+    }
+    catch
+    {
+        Write-Host $_.Exception.Message -ForegroundColor Red
+        $ImportCertificateError = $True
+        ShowAppDetails
+        CloseConnection
+    }
+    Write-Host "`nCertificate imported successfully" -ForegroundColor Green
+}
+Function UpdateCertficateDetails
+{
+    $GetAppInfo= Get-MgApplication -ApplicationId $APPObjectID -Property KeyCredentials
+    $Thumbprint=$Certificate.Thumbprint
+    $CertificateName=$Certificate.Subject
+    if($GetAppInfo -ne $null)
+    {
+        $NewKeys+=$GetAppInfo.KeyCredentials 
+        UploadCertificate
+        # Get new certificate key credentials after updating new certificate
+        Start-Sleep -Milliseconds 10000 # Takes time to update certificate to an application
+        while(1)
+        {
+            $GetAppInfo= Get-MgApplication -ApplicationId $APPObjectID -Property KeyCredentials
+            if($GetAppInfo.KeyCredentials -eq $null)
+            {
+                Write-Host "The certificate is not yet uploaded to an application. Waiting for 3 seconds..." -ForegroundColor Yellow
+                Start-Sleep -Seconds 3
+                Continue
+            }
+            break
+        }
+        $NewKeys+=$GetAppInfo.KeyCredentials  #new keycredential
+        Update-MgApplication -ApplicationId $APPObjectID -KeyCredentials $NewKeys
+    }
+    else 
+    {
+        Write-Host "The application does not exist. Please try again with a different name." -ForegroundColor Green
+    }
+}
+function UploadCertificate 
+{
+    Write-Progress -Activity "Uploading certificate"
+    $KeyCredential = @{
+        Type  = "AsymmetricX509Cert";
+        Usage = "Verify";
+        key   = $Certificate.RawData
+    }
+    Update-MgApplication -ApplicationId $APPObjectID  -KeyCredentials $KeyCredential -ErrorAction SilentlyContinue -ErrorVariable ApplicationError
+    if($ApplicationError -ne $null)
+    {
+        Write-Host "$ApplicationError" -ForegroundColor Red
+        CloseConnection 
+    }
+    Write-Host "`nCertificate uploaded successfully" -ForegroundColor Green
+    $Script:Thumbprint = $Certificate.Thumbprint
+}
+function SecureCertificate
+{
+    Write-Progress -Activity "Exporting pfx certificate" 
+    $Script:CertificateLocation = Get-Location
+    $Script:CertificateLocation = "$CertificateLocation\$CertificateName.pfx"
+    $GetPassword = Read-Host "`nPlease enter password to secure your certificate"
+    try
+    {
+        $script:ExportError="False"
+        $MyPwd = ConvertTo-SecureString -String "$GetPassword" -Force -AsPlainText
+        Export-PfxCertificate -Cert "Cert:\CurrentUser\My\$Thumbprint" -FilePath "$CertificateLocation" -Password $MyPwd |Out-Null
+    }
+    catch
+    {
+        $script:ExportError="True"
+        Write-Host $_.Exception.Message  -ForegroundColor Red
+        return
+    }
+    Write-Host "`nPfx file exported successfully" -ForegroundColor Green
+}
+function GrantPermission
+{
+    Write-Progress -Activity "Granting admin consent..."
+    Start-Sleep -Seconds 20
+    $Script:ClientID = $App.AppId
+    $URL = "https://login.microsoftonline.com/$TenantID/adminconsent"
+    $Url="$URL`?client_id=$ClientID"
+    Write-Host "`nMS Graph requires admin consent to access data. Please grant access to the application" -ForegroundColor Cyan
+    While(1)
+    {
+        Add-Type -AssemblyName System.Windows.Forms
+        $script:mainForm = New-Object System.Windows.Forms.Form -Property @{
+            Width  = 680
+            Height = 640
+        }
+        $script:webBrowser = New-Object System.Windows.Forms.WebBrowser -Property @{
+            Width  = 680
+            Height = 640
+            URL    = $URL
+        }
+        $document={
+            if($webBrowser.Url -eq "$RedirectURI`?admin_consent=True&tenant=$TenantID" -or $webBrowser.Url -match "error")
+            {
+                $mainForm.Close()
+            }
+            if($webBrowser.DocumentText.Contains("We received a bad request"))
+            {
+                $mainForm.Close()
+            }
+        }
+        $webBrowser.ScriptErrorsSuppressed = $true
+        $webBrowser.Add_DocumentCompleted($document)
+        $mainForm.Controls.Add($webBrowser)
+        $mainForm.Add_Shown({ $mainForm.Activate() ;$mainForm.Refresh()})
+        [void] $mainForm.ShowDialog()
+        if($webBrowser.Url.AbsoluteUri -eq "$RedirectURI`?admin_consent=True&tenant=$TenantID")
+        {
+            Write-Host "`nAdmin consent granted successfully" -ForegroundColor Green
+            break
+        }
+        else
+        {
+            Write-Host "`nAdmin consent failed." -ForegroundColor Red
+            $Confirm = Read-Host "Do you want to retry admin consent? [Y] Yes [N] No"
+            if($confirm -match "[yY]")
+            {
+                Continue
+            } 
+            else
+            {
+                Write-Host "You can grant admin consent manually in azure portal." -ForegroundColor Yellow
+                break
+            }
+        }
+    }
+}
+Function ShowAppDetails
+{
+    Write-Host "`nApp info:" -ForegroundColor Magenta
+    $GetAppInfo = Get-MgApplication|?{$_.AppId -eq "$APPID"}
+    $Owner = Get-MgApplicationOwner -ApplicationId $GetAppInfo.Id|Select-Object -ExpandProperty AdditionalProperties
+    $Script:CertificateList = $GetAppInfo.KeyCredentials
+    $AppInfo=[pscustomobject]@{'App Name'              = $GetAppInfo.DisplayName
+                               'Application(Client) Id'        = $GetAppInfo.AppId
+                               'Object Id' = $GetAppInfo.Id
+                               'Tenant Id'             = $TenantID
+                               'CertificateThumbprint' = $Thumbprint
+                               'App Created Date Time' = $GetAppInfo.CreatedDateTime
+                               'App Owner'             = (@($Owner.displayName)| Out-String).Trim()
+    }
+    if($ImportCertificateError -eq $True)
+    {
+        $AppInfo | select 'App Name','Application(Client) Id','Object Id','Tenant Id','App Created Date Time','App Owner'|fl
+        Write-Host "You can copy & save" -NoNewline
+        Write-Host " Client Id" -ForegroundColor Cyan -NoNewline
+        Write-Host " and try again to add certificate to your application."
+        Return
+    }
+    if($Action -ne 5)
+    {
+        $AppInfo | select 'App Name','Application(Client) Id','Object Id','Tenant Id','CertificateThumbprint','App Created Date Time','App Owner'|fl
+        Write-Host "You can copy and save" -NoNewline
+        Write-Host " Client Id, Tenant Id, Certificate ThumbPrint" -ForegroundColor Cyan -NoNewline
+        Write-Host " as they will be required to connect to MS Graph PowerShell using certificate-based authentication."
+    }
+    else
+    {
+        $AppInfo | select 'App Name','Application(Client) Id','Object Id','Tenant Id','App Created Date Time','App Owner'|fl
+        Write-Host "App certificates  :"
+        $CertificateList | Format-Table -Property DisplayName, KeyId, StartdateTime, EndDateTime
+
+    }
+}
+Function RevokeCertificate
+{
+    Write-Progress -Activity "Revoking certificate"
+    $NewKeys = @()
+    $APPID = Read-Host "Enter an application ID(Client ID) you want to revoke the certificate for that app"
+    $GetAppInfo = Get-MgApplication |?{$_.AppId -eq "$APPID"}
+    if($GetAppInfo -ne $null)
+    {
+        ShowAppDetails
+        $KeyId=Read-Host "`nEnter the certificate key ID to revoke that certificate"
+        if($GetAppInfo.KeyCredentials.KeyId -notcontains($KeyId))
+        {
+            Write-Host "Certificate not found" -ForegroundColor Red
+            CloseConnection
+        }
+        foreach($List in $CertificateList)
+        {
+            if($List.KeyId -eq "$KeyId")
+            {
+                continue
+            }
+            $NewKeys+=$List
+        }
+        Update-MgApplication -ApplicationId $GetAppInfo.Id -KeyCredentials $NewKeys 
+        Write-Host "`nCertificate revoked successfully" -ForegroundColor Green
+    }
+    else 
+    {
+        Write-Host "The application does not exist." -ForegroundColor Red
+        CloseConnection
+    }
+}
+Function ConnectApplication
+{
+    Write-Progress -Activity "Connecting MS Graph"
+    try
+    {
+        if($ParameterPassed -eq "False")
+        {
+            $TenantID = Read-Host "`nPlease provide the tenant ID of the application"
+            $ClientID = Read-Host "Please provide the client ID of the application"
+            While($true){
+                $CertificatePath = Read-Host "Please provide certificate path(.cer or .pfx)"
+                $TestPath = Test-Path -Path $CertificatePath -PathType Leaf
+                if($TestPath -eq $false)
+                {
+                    Write-Host "The certificate file could not be found." -ForegroundColor Red
+                    Continue
+                }
+            }
+            $CheckExtension = (Get-ChildItem "$CertificatePath").Extension
+            if($CheckExtension -eq ".pfx")
+            { 
+                $Password = Read-Host "Please enter password to import certificate"
+                $MyPwd = ConvertTo-SecureString -String "$Password" -Force -AsPlainText
+                $LoadCertificate = Import-PfxCertificate -FilePath $CertificatePath -CertStoreLocation "Cert:\CurrentUser\My" -Password $MyPwd
+            }
+            else
+            {
+                $LoadCertificate = Import-Certificate -FilePath "$CertificatePath" -CertStoreLocation "Cert:\CurrentUser\My"
+            }
+            $CertificateThumbprint = $LoadCertificate.Thumbprint
+        }
+    }
+    catch
+    {
+        Write-Host $_.Exception.Message -ForegroundColor Red
+        Exit
+    }
+    Connect-MgGraph -TenantId $TenantID -ClientId $ClientID -CertificateThumbprint $CertificateThumbprint -ErrorAction SilentlyContinue -ErrorVariable ApplicationConnectionError
+    if($ApplicationConnectionError -ne $null)
+    {
+        Write-Host $ApplicationConnectionError -ForegroundColor Red
+        Exit
+    }
+    
+    Get-MgContext
+}
+function CloseConnection
+{
+   Disconnect-MgGraph|Out-Null 
+   Exit
+}
+$ParameterPassed="False"
+if($TenantID -ne $null -and $ClientID -ne $null -and $CertificateThumbprint -ne $null)
+{
+    $ParameterPassed="True"
+    ConnectApplication
+    Exit
+}
+Write-Host "`nWe can perform below operations." -ForegroundColor Cyan
+Write-Host "           1. Register an app with new certificate" -ForegroundColor Yellow -NoNewline
+Write-Host " (Creates application - >Adds new certificate -> Grants admin consent -> Exports certificate)" -ForegroundColor White
+Write-Host "           2. Register an app with existing certificate" -ForegroundColor Yellow -NoNewline
+Write-Host " (Creates application -> Adds existing certificate -> Grants admin consent)" -ForegroundColor White
+Write-Host "           3. Add certificate to an existing application" -ForegroundColor Yellow 
+Write-Host "           4. Connect MgGraph" -ForegroundColor Yellow
+Write-Host "           5. Revoke certificate" -ForegroundColor Yellow
+$Action=Read-Host "`nPlease choose the action to continue" 
+switch($Action){
+   1 {  
+   Write-Host "`nConnecting to MS Graph to create a application..."
+        ConnectMgGraphModule
+        RegisterApplication
+        CertificateCreation
+        UploadCertificate
+        SecureCertificate
+        GrantPermission
+        ShowAppDetails
+        if($ExportError -ne "True")
+        {
+            Write-Host "`nYour Pfx certificate is available in $CertificateLocation" -ForegroundColor Green
+        }
+        break
+
+   }
+   2 {
+        Write-Host "`nConnecting to MS Graph to create a application.."
+        ConnectMgGraphModule
+        RegisterApplication
+        ImportCertificate
+        UploadCertificate
+        GrantPermission
+        ShowAppDetails
+        break
+   }
+   3 {
+        ConnectMgGraphModule
+        $APPID = Read-Host "Enter the application id(Client id) of the app:"
+        $AppInfo = Get-MgApplication |?{$_.AppId -eq "$APPID"}
+        if($AppInfo -eq $null)
+        {
+            Write-Host "Application not found." -ForegroundColor Red
+            CloseConnection
+        }
+        $AppName = $AppInfo.DisplayName
+        $APPObjectID =$AppInfo.Id
+        $confirm= Read-Host Are you sure you want to create new certificate? [Y] Yes [N] No. Select '"No"' to import existing certificate.  
+        if($confirm -match "[yY]") 
+        { 
+            CertificateCreation
+        } 
+        else
+        { 
+            ImportCertificate
+        } 
+        UpdateCertficateDetails
+        ShowAppDetails
+        break
+   }
+   4 {
+        ConnectApplication
+        Exit
+   }
+   5 {
+        ConnectMgGraphModule
+        RevokeCertificate
+        break
+   }
+   Default {
+        Write-Host "No Action Found" -ForegroundColor Red
+        Exit
+    }
+}
+CloseConnection
\ No newline at end of file