diff --git a/src/AdminResources/Emails.php b/src/AdminResources/Emails.php
index c984f97..c93391b 100644
--- a/src/AdminResources/Emails.php
+++ b/src/AdminResources/Emails.php
@@ -7,12 +7,16 @@
 
 class Emails extends MsGraphAdmin
 {
+    private ?bool $delta = null;
+
     private string $userId = '';
 
     private string $top = '100';
 
     private string $skip = '0';
 
+    private string $search = '';
+
     private string $subject = '';
 
     private string $body = '';
@@ -106,6 +110,13 @@ public function attachments(array $attachments): static
         return $this;
     }
 
+    public function delta(?bool $delta = true): static
+    {
+        $this->delta = $delta;
+
+        return $this;
+    }
+
     /**
      * @throws Exception
      */
@@ -117,6 +128,11 @@ public function get(array $params = []): array
 
         $top = request('top', $this->top);
         $skip = request('skip', $this->skip);
+        $search = request('search', $this->search);
+
+        if (filled($search) && $this->delta) {
+            throw new Exception('Search is not supported in delta queries.');
+        }
 
         if ($params == []) {
             $params = http_build_query([
@@ -130,7 +146,8 @@ public function get(array $params = []): array
         }
 
         // get messages from folderId
-        $emails = MsGraphAdmin::get('users/'.$this->userId.'/messages?'.$params);
+        $messages = $this->delta ? 'messages/delta' : 'messages';
+        $emails = MsGraphAdmin::get('users/'.$this->userId.'/'.$messages.'?'.$params);
 
         if (isset($emails->error)) {
             throw new Exception("Graph API Error, code: {$emails->error->code}, Message: {$emails->error->message}");
diff --git a/src/MsGraph.php b/src/MsGraph.php
index 2094237..4b7bb8f 100755
--- a/src/MsGraph.php
+++ b/src/MsGraph.php
@@ -341,7 +341,7 @@ protected function guzzle(string $type, string $request, array $data = [], array
 
         } catch (ClientException $e) {
             throw new Exception($e->getMessage());
-            //return json_decode(($e->getResponse()->getBody()->getContents()));
+            // return json_decode(($e->getResponse()->getBody()->getContents()));
         } catch (Exception $e) {
             throw new Exception($e->getMessage());
         }
diff --git a/src/Resources/Emails/Emails.php b/src/Resources/Emails/Emails.php
index 70d4b22..10627f5 100644
--- a/src/Resources/Emails/Emails.php
+++ b/src/Resources/Emails/Emails.php
@@ -8,15 +8,14 @@
 
 class Emails extends MsGraph
 {
-    public function folders(): Folders
-    {
-        return new Folders;
-    }
+    private ?bool $delta = null;
 
     private string $top = '';
 
     private string $skip = '';
 
+    private string $search = '';
+
     private string $subject = '';
 
     private string $body = '';
@@ -91,6 +90,11 @@ public function attachments(array $attachments): static
         return $this;
     }
 
+    public function folders(): Folders
+    {
+        return new Folders;
+    }
+
     public function singleValueExtendedProperties(array $singleValueExtendedProperties): static
     {
         $this->singleValueExtendedProperties = $singleValueExtendedProperties;
@@ -112,6 +116,13 @@ public function skip(string $skip): static
         return $this;
     }
 
+    public function delta(?bool $delta = true): static
+    {
+        $this->delta = $delta;
+
+        return $this;
+    }
+
     /**
      * @throws Exception
      */
@@ -121,6 +132,11 @@ public function get(string $folderIdOrName = 'Inbox', array $params = []): array
 
         $top = request('top', $this->top);
         $skip = request('skip', $this->skip);
+        $search = request('search', $this->search);
+
+        if (filled($search) && $this->delta) {
+            throw new Exception('Search is not supported in delta queries.');
+        }
 
         if ($top === '') {
             $top = 25;
@@ -138,16 +154,28 @@ public function get(string $folderIdOrName = 'Inbox', array $params = []): array
             ];
         }
 
-        if ($this->isId($folderIdOrName)) {
-            $folder = MsGraph::emails()->folders()->find($folderIdOrName);
-        } else {
-            $folder = MsGraph::emails()->folders()->findByName($folderIdOrName);
-        }
+        $folder = $folderId == '' ? 'Inbox' : $folderId;
+
+        // get inbox from folders list
+        $folder = MsGraph::get("me/mailFolders?\$filter=startswith(displayName,'$folder')");
 
-        if ($folder !== []) {
-            return MsGraph::get("me/mailFolders/".$folder['id']."/messages?".http_build_query($params));
-        } else {
-            throw new Exception('Email folder not found');
+        if (isset($folder['value'][0])) {
+            // folder id
+            $folderId = $folder['value'][0]['id'];
+            $messages = $this->delta ? 'messages/delta' : 'messages';
+
+            // get messages from folderId
+            if ($this->isId($folderIdOrName)) {
+                $folder = MsGraph::emails()->folders()->find($folderIdOrName);
+            } else {
+                $folder = MsGraph::emails()->folders()->findByName($folderIdOrName);
+            }
+
+            if ($folder !== []) {
+                return MsGraph::get('me/mailFolders/'.$folder['id']."/{$messages}?".http_build_query($params));
+            } else {
+                throw new Exception('Email folder not found');
+            }
         }
     }
 
diff --git a/src/Resources/Emails/Folders.php b/src/Resources/Emails/Folders.php
index 454342e..cf6c013 100644
--- a/src/Resources/Emails/Folders.php
+++ b/src/Resources/Emails/Folders.php
@@ -39,6 +39,7 @@ public function find(string $id): array
     public function findByName(string $name): array
     {
         $response = MsGraph::get("me/mailFolders?\$filter=startswith(displayName,'$name')");
+
         return $response['value'][0] ?? [];
     }
 
diff --git a/src/Validators/GraphQueryValidator.php b/src/Validators/GraphQueryValidator.php
index 79914da..f0e2f8b 100644
--- a/src/Validators/GraphQueryValidator.php
+++ b/src/Validators/GraphQueryValidator.php
@@ -4,8 +4,6 @@
 
 namespace Dcblogdev\MsGraph\Validators;
 
-use InvalidArgumentException;
-
 class GraphQueryValidator extends Validator
 {
     protected static array $allowedParams = [
diff --git a/tests/Validators/EmailFolderUpdateValidatorTest.php b/tests/Validators/EmailFolderUpdateValidatorTest.php
index b04ba8a..519dcd8 100644
--- a/tests/Validators/EmailFolderUpdateValidatorTest.php
+++ b/tests/Validators/EmailFolderUpdateValidatorTest.php
@@ -4,11 +4,11 @@
 
 test('valid parameters are accepted', function () {
     $response = EmailFolderUpdateValidator::validate([
-        'displayName' => 'demo'
+        'displayName' => 'demo',
     ]);
 
     expect($response)->toEqual([
-        'displayName' => 'demo'
+        'displayName' => 'demo',
     ]);
 });
 
diff --git a/tests/Validators/GraphQueryValidatorTest.php b/tests/Validators/GraphQueryValidatorTest.php
index b3d87ad..54b138f 100644
--- a/tests/Validators/GraphQueryValidatorTest.php
+++ b/tests/Validators/GraphQueryValidatorTest.php
@@ -40,4 +40,4 @@
         '$search' => 'test',
         '$format' => 'pdf',
     ]);
-})->throws(InvalidArgumentException::class, 'Invalid parameters: $tops. Allowed parameters: $top, $skip, $filter, $orderby, $select, $expand, $count, $search, $format.');
\ No newline at end of file
+})->throws(InvalidArgumentException::class, 'Invalid parameters: $tops. Allowed parameters: $top, $skip, $filter, $orderby, $select, $expand, $count, $search, $format.');
diff --git a/tests/Validators/ValidatorTest.php b/tests/Validators/ValidatorTest.php
index 701777e..f7f20ce 100644
--- a/tests/Validators/ValidatorTest.php
+++ b/tests/Validators/ValidatorTest.php
@@ -10,6 +10,6 @@
 
 test('cannot validate none existing params', function () {
     Validator::validate([
-        '$top' => 10
+        '$top' => 10,
     ]);
-})->throws(InvalidArgumentException::class, 'Invalid parameters: $top. Allowed parameters: .');
\ No newline at end of file
+})->throws(InvalidArgumentException::class, 'Invalid parameters: $top. Allowed parameters: .');