diff --git a/ProcessMaker/Mail/MicrosoftGraphMessageConverter.php b/ProcessMaker/Mail/MicrosoftGraphMessageConverter.php
new file mode 100644
index 0000000000..e95a3ea281
--- /dev/null
+++ b/ProcessMaker/Mail/MicrosoftGraphMessageConverter.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace ProcessMaker\Mail;
+
+use Symfony\Component\Mime\Address;
+use Symfony\Component\Mime\Email;
+
+class MicrosoftGraphMessageConverter
+{
+    public static function toSendMailPayload(Email $email): array
+    {
+        $htmlBody = $email->getHtmlBody();
+        $textBody = $email->getTextBody();
+
+        $message = [
+            'subject' => $email->getSubject() ?? '',
+            'body' => [
+                'contentType' => $htmlBody !== null ? 'HTML' : 'Text',
+                'content' => $htmlBody ?? $textBody ?? '',
+            ],
+            'toRecipients' => self::convertAddresses($email->getTo()),
+        ];
+
+        $ccRecipients = self::convertAddresses($email->getCc());
+        if ($ccRecipients) {
+            $message['ccRecipients'] = $ccRecipients;
+        }
+
+        $bccRecipients = self::convertAddresses($email->getBcc());
+        if ($bccRecipients) {
+            $message['bccRecipients'] = $bccRecipients;
+        }
+
+        return [
+            'message' => $message,
+            'saveToSentItems' => true,
+        ];
+    }
+
+    /**
+     * @param  Address[]  $addresses
+     */
+    private static function convertAddresses(array $addresses): array
+    {
+        return array_map(function (Address $address) {
+            $emailAddress = ['address' => $address->getAddress()];
+
+            if ($address->getName()) {
+                $emailAddress['name'] = $address->getName();
+            }
+
+            return ['emailAddress' => $emailAddress];
+        }, $addresses);
+    }
+}
diff --git a/ProcessMaker/Mail/MicrosoftGraphTokenProvider.php b/ProcessMaker/Mail/MicrosoftGraphTokenProvider.php
index 913274bea6..1b97e5af05 100644
--- a/ProcessMaker/Mail/MicrosoftGraphTokenProvider.php
+++ b/ProcessMaker/Mail/MicrosoftGraphTokenProvider.php
@@ -15,7 +15,7 @@ class MicrosoftGraphTokenProvider
     public function __construct(
         private array $config,
         private int|string $serverIndex = 0,
-        private ?Client $httpClient = null,
+        private ?Client $httpClient = null
     ) {
     }
 
diff --git a/ProcessMaker/Mail/Transports/MicrosoftGraphTransport.php b/ProcessMaker/Mail/Transports/MicrosoftGraphTransport.php
new file mode 100644
index 0000000000..59ff0d1b96
--- /dev/null
+++ b/ProcessMaker/Mail/Transports/MicrosoftGraphTransport.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace ProcessMaker\Mail\Transports;
+
+use GuzzleHttp\Client;
+use ProcessMaker\Mail\MicrosoftGraphMessageConverter;
+use ProcessMaker\Mail\MicrosoftGraphTokenProvider;
+use Symfony\Component\Mailer\Exception\TransportException;
+use Symfony\Component\Mailer\SentMessage;
+use Symfony\Component\Mailer\Transport\AbstractTransport;
+use Symfony\Component\Mime\MessageConverter;
+
+class MicrosoftGraphTransport extends AbstractTransport
+{
+    public function __construct(
+        private MicrosoftGraphTokenProvider $tokenProvider,
+        private string $senderEmail,
+        private ?Client $client = null
+    ) {
+        parent::__construct();
+
+        $this->client = $client ?? new Client([
+            'base_uri' => 'https://graph.microsoft.com/v1.0/',
+        ]);
+    }
+
+    protected function doSend(SentMessage $message): void
+    {
+        $email = MessageConverter::toEmail($message->getOriginalMessage());
+        $payload = MicrosoftGraphMessageConverter::toSendMailPayload($email);
+        $token = $this->tokenProvider->getAccessToken();
+
+        $response = $this->client->post('users/' . rawurlencode($this->senderEmail) . '/sendMail', [
+            'headers' => [
+                'Authorization' => 'Bearer ' . $token,
+                'Content-Type' => 'application/json',
+            ],
+            'json' => $payload,
+            'http_errors' => false,
+        ]);
+
+        if ($response->getStatusCode() >= 400) {
+            throw new TransportException(
+                'Microsoft Graph send failed: ' . $response->getBody()->getContents()
+            );
+        }
+    }
+
+    public function __toString(): string
+    {
+        return 'microsoft-graph';
+    }
+}
diff --git a/ProcessMaker/Managers/OauthMailManager.php b/ProcessMaker/Managers/OauthMailManager.php
index 603b174970..58a7d08b12 100644
--- a/ProcessMaker/Managers/OauthMailManager.php
+++ b/ProcessMaker/Managers/OauthMailManager.php
@@ -7,6 +7,8 @@
 use Google\Client as GoogleClient;
 use GuzzleHttp\Client;
 use Illuminate\Mail\MailManager;
+use ProcessMaker\Mail\MicrosoftGraphTokenProvider;
+use ProcessMaker\Mail\Transports\MicrosoftGraphTransport;
 use ProcessMaker\Models\EnvironmentVariable;
 use ProcessMaker\Models\Setting;
 use ProcessMaker\Packages\Connectors\Email\EmailConfig;
@@ -77,6 +79,26 @@ protected function createSmtpTransport($config)
         return $transport;
     }
 
+    public function createTransport(array $config)
+    {
+        if ($this->app->config->get('mail.driver') === 'microsoft_graph') {
+            return $this->createMicrosoftGraphTransport($config);
+        }
+
+        return parent::createTransport($config);
+    }
+
+    protected function createMicrosoftGraphTransport(array $config)
+    {
+        return new MicrosoftGraphTransport(
+            new MicrosoftGraphTokenProvider(
+                $this->app->config->get('services.microsoft_graph', []),
+                $this->emailServerIndex ?? 0
+            ),
+            $this->fromAddress
+        );
+    }
+
     public function checkForExpiredAccessToken()
     {
         switch ($this->authMethod) {
diff --git a/config/mail.php b/config/mail.php
index d78ea38d62..1b524c46c7 100644
--- a/config/mail.php
+++ b/config/mail.php
@@ -86,6 +86,10 @@
             'transport' => 'array',
         ],
 
+        'microsoft_graph' => [
+            'transport' => 'microsoft_graph',
+        ],
+
         'failover' => [
             'transport' => 'failover',
             'mailers' => [
diff --git a/resources/js/admin/settings/components/SettingsListing.vue b/resources/js/admin/settings/components/SettingsListing.vue
index ecba515d51..0d489764b3 100644
--- a/resources/js/admin/settings/components/SettingsListing.vue
+++ b/resources/js/admin/settings/components/SettingsListing.vue
@@ -607,7 +607,7 @@ export default {
     filterEmailServerButtons(groupName, groupData, btn) {
       const authMethod = groupData.find(data => data.key.includes("EMAIL_CONNECTOR_MAIL_AUTH_METHOD"));
       const selectedAuthMethod = authMethod ? authMethod.ui.options[authMethod.config] : null;
-      const showAuthAccBtn = selectedAuthMethod && selectedAuthMethod !== 'standard' ? true : false;
+      const showAuthAccBtn = selectedAuthMethod && selectedAuthMethod !== 'standard';
 
       if (groupName.includes('Email Server') && !showAuthAccBtn)  {
         // Returns all 'top' position buttons except the '+ Mail Server' and 'Authorize Account' button for email server tabs