diff --git a/lib/Providers/MessageProperties.php b/lib/Providers/MessageProperties.php
index 35da2e1..09a2fa5 100644
--- a/lib/Providers/MessageProperties.php
+++ b/lib/Providers/MessageProperties.php
@@ -112,20 +112,33 @@ class MessageProperties extends MessagePropertiesMutableAbstract {
         return $this;
     }
 
-    private static function normalizeFlag(string $flag): string
+    public function toImap(): array
     {
-        $flag = ltrim($flag, '\\');
+        $message = [];
 
-        return match (strtolower($flag)) {
-            'seen' => 'read',
-            'flagged' => 'flagged',
-            'answered' => 'answered',
-            'draft' => 'draft',
-            'deleted' => 'deleted',
-            default => strtolower($flag),
-        };
+        if (isset($this->data['flags'])) {
+            $message['flags'] = $this->data['flags'];
+        }
+
+        return $message;
     }
 
+    /**
+     * Hydrate from store array
+     */
+    public function fromStore(array $data): static {
+        $this->data = $data;
+        return $this;
+    }
+
+    /**
+     * Serialize to store array
+     */
+    public function toStore(): array {
+        return $this->data;
+    }
+
+
     /**
      * Convert a string to UTF-8 from the given charset.
      *
@@ -181,18 +194,4 @@ class MessageProperties extends MessagePropertiesMutableAbstract {
         $attachments[] = $part->toArray();
     }
 
-    /**
-     * Serialize to store array
-     */
-    public function toStore(): array {
-        return $this->data;
-    }
-
-    /**
-     * Hydrate from store array
-     */
-    public function fromStore(array $data): static {
-        $this->data = $data;
-        return $this;
-    }
 }
diff --git a/lib/Providers/Service.php b/lib/Providers/Service.php
index 8cf2993..6ee4e03 100644
--- a/lib/Providers/Service.php
+++ b/lib/Providers/Service.php
@@ -12,10 +12,13 @@ namespace KTXM\ProviderImap\Providers;
 use Generator;
 use KTXF\Mail\Collection\CollectionBaseInterface;
 use KTXF\Mail\Collection\CollectionMutableInterface;
+use KTXF\Mail\Entity\EntityBaseInterface;
+use KTXF\Mail\Entity\EntityMutableInterface;
 use KTXF\Mail\Object\Address;
 use KTXF\Mail\Object\AddressInterface;
 use KTXF\Mail\Service\ServiceBaseInterface;
 use KTXF\Mail\Service\ServiceCollectionMutableInterface;
+use KTXF\Mail\Service\ServiceEntityMutableInterface;
 use KTXF\Mail\Service\ServiceConfigurableInterface;
 use KTXF\Mail\Service\ServiceMutableInterface;
 use KTXF\Resource\Provider\ResourceServiceIdentityInterface;
@@ -37,12 +40,13 @@ use KTXM\ProviderImap\Service\Remote\RemoteMailService;
 use KTXM\ProviderImap\Service\Remote\RemoteService;
 use KTXM\ProviderImap\Providers\CollectionResource;
 use KTXF\Mail\Collection\CollectionRoles;
+use KTXF\Mail\Object\MessagePropertiesMutableInterface;
 use KTXM\ProviderImap\Providers\EntityResource;
 
 /**
  * IMAP Mail Service
  */
-class Service implements ServiceBaseInterface, ServiceMutableInterface, ServiceConfigurableInterface, ServiceCollectionMutableInterface
+class Service implements ServiceBaseInterface, ServiceMutableInterface, ServiceConfigurableInterface, ServiceCollectionMutableInterface, ServiceEntityMutableInterface
 {
     public const JSON_TYPE = ServiceBaseInterface::JSON_TYPE;
 
@@ -354,6 +358,8 @@ class Service implements ServiceBaseInterface, ServiceMutableInterface, ServiceC
     {
         $this->initialize();
         
+        $list = [];
+
         foreach ($this->mailService->collectionList($location, $filter, $sort) as $mailbox) {
             $resource = $this->collectionFresh();
             $resource->fromImap($mailbox);
@@ -377,10 +383,10 @@ class Service implements ServiceBaseInterface, ServiceMutableInterface, ServiceC
     {
         $this->initialize();
 
-        $mailboxes = $this->collectionList();
+        $mailboxes = $this->collectionList(null);
         $extant   = [];
         foreach ($identifiers as $id) {
-            $extant[(string) $id] = isset($existing[(string) $id]);
+            $extant[(string) $id] = isset($mailboxes[(string) $id]);
         }
         return $extant;
     }
@@ -400,12 +406,12 @@ class Service implements ServiceBaseInterface, ServiceMutableInterface, ServiceC
         return $collection;
     }
 
-    public function collectionFresh(): CollectionMutableInterface
+    public function collectionFresh(): CollectionResource
     {
         return new CollectionResource($this->provider(), $this->identifier());
     }
 
-    public function collectionCreate(string|int|null $location, CollectionMutableInterface $collection, array $options = []): CollectionBaseInterface
+    public function collectionCreate(string|int|null $location, CollectionMutableInterface $collection, array $options = []): CollectionBaseInterface 
     {
         $this->initialize();
 
@@ -540,7 +546,7 @@ class Service implements ServiceBaseInterface, ServiceMutableInterface, ServiceC
         };
     }
     
-    public function entityFetch(string|int $collection, string|int ...$identifiers): array
+    public function entityFetch(string|int $collection, string|int ...$identifiers): array 
     {
         $this->initialize();
 
@@ -571,10 +577,20 @@ class Service implements ServiceBaseInterface, ServiceMutableInterface, ServiceC
         return new EntityResource($this->provider(), $this->identifier());
     }
 
-    public function entityDelete(EntityIdentifier ...$identifiers): array
+    public function entityCreate(CollectionIdentifier $target, MessagePropertiesMutableInterface $properties, array $options = []): EntityResource
+    {
+        return $this->entityFresh();
+    }
+
+    public function entityModify(EntityIdentifier $target, MessagePropertiesMutableInterface $properties): EntityResource
+    {
+        return $this->entityFresh();
+    }
+
+    public function entityDelete(EntityIdentifier ...$targets): array
     {
         // validate identifiers and group by collection
-        $identifiers = $this->groupEntitiesByCollection(...$identifiers);
+        $targets = $this->groupEntitiesByCollection(...$targets);
 
         // determine delete mode and target collection (e.g. Trash) if applicable
         $deleteMode = $this->auxiliary['deleteMode'] ?? 'soft';
@@ -606,7 +622,7 @@ class Service implements ServiceBaseInterface, ServiceMutableInterface, ServiceC
 
         // entities need to be moved or deleted by collection
         $list = [];
-        foreach ($identifiers as $sourceCollection => $sourceEntities) {
+        foreach ($targets as $sourceCollection => $sourceEntities) {
             if ($deleteMode === 'soft' && $sourceCollection === $deleteTargetNative) {
                 continue;
             }
@@ -631,7 +647,30 @@ class Service implements ServiceBaseInterface, ServiceMutableInterface, ServiceC
         return $results;
     }
 
-    public function entityMove(CollectionIdentifier $target, EntityIdentifier ...$identifiers): array
+    public function entityPatch(MessagePropertiesMutableInterface $properties, EntityIdentifier ...$targets): array
+    {
+        // validate identifiers and group by collection
+        $targets = $this->groupEntitiesByCollection(...$targets);
+
+         // move entities on remote store and construct result map
+        $this->initialize();
+        
+        $list = [];
+
+        foreach ($targets as $targetCollection => $targetIdentifiers) {
+            $uids = array_keys($targetIdentifiers);
+
+            $mutations = $this->mailService->entityPatch($targetCollection, $properties, ...$uids);
+
+            foreach ($uids as $uid) {
+                $list[(string)$targetIdentifiers[$uid]] = ['disposition' => 'patched'];
+            }
+        }
+
+        return $list;
+    }
+
+    public function entityCopy(CollectionIdentifier $target, EntityIdentifier ...$sources): array
     {
         // validate target belongs to this service
         if ($target->provider() !== $this->provider() || $target->service() !== $this->identifier()) {
@@ -639,12 +678,47 @@ class Service implements ServiceBaseInterface, ServiceMutableInterface, ServiceC
         }
 
         // validate identifiers and group by collection
-        $identifiers = $this->groupEntitiesByCollection(...$identifiers);
+        $sources = $this->groupEntitiesByCollection(...$sources);
+
+        // copy entities on remote store and construct result map
+        $this->initialize();
+
+        $list = [];
+        
+        foreach ($sources as $sourceCollection => $sourceEntities) {
+            $uids = array_keys($sourceEntities);
+
+            $mutations = $this->mailService->entityCopy($target->collection(), $sourceCollection, ...$uids);
+
+            foreach ($uids as $uid) {
+                $mutatedUid = $mutations[$uid] ?? null;
+                $list[(string)$sourceEntities[$uid]] = [
+                    'disposition' => $mutatedUid !== null ? 'copied' : 'error',
+                    'destination' => $target,
+                    'mutation' => $mutatedUid !== null ? new EntityIdentifier($this->provider(), $this->identifier(), $target->collection(), $mutatedUid) : null,
+                ];
+            }
+        }
+
+        return $list;
+    }
+
+    public function entityMove(CollectionIdentifier $target, EntityIdentifier ...$sources): array
+    {
+        // validate target belongs to this service
+        if ($target->provider() !== $this->provider() || $target->service() !== $this->identifier()) {
+            throw new \InvalidArgumentException('Target collection does not belong to this service: ' . $target);
+        }
+
+        // validate identifiers and group by collection
+        $sources = $this->groupEntitiesByCollection(...$sources);
 
         // move entities on remote store and construct result map
         $this->initialize();
+        
         $list = [];
-        foreach ($identifiers as $sourceCollection => $sourceEntities) {
+
+        foreach ($sources as $sourceCollection => $sourceEntities) {
             $uids = array_keys($sourceEntities);
 
             $mutations = $this->mailService->entityMove($target->collection(), $sourceCollection, ...$uids);
diff --git a/lib/Service/Remote/RemoteMailService.php b/lib/Service/Remote/RemoteMailService.php
index 398b669..6aade5e 100644
--- a/lib/Service/Remote/RemoteMailService.php
+++ b/lib/Service/Remote/RemoteMailService.php
@@ -59,8 +59,6 @@ class RemoteMailService
 
     public function __construct(
         private readonly Client $client,
-        private readonly string $provider,
-        private readonly string|int $service,
     ) {}
 
     /**
@@ -330,6 +328,31 @@ class RemoteMailService
         return array_fill_keys($uids, true);
     }
 
+    public function entityPatch(string $collection, array $flagsToAdd = [], array $flagsToRemove = [], int ...$uids): void
+    {
+        if (empty($uids)) {
+            return;
+        }
+
+        $this->client->perform(new SelectCommand($collection, false));
+
+        if (!empty($flagsToAdd)) {
+            $this->client->perform(new StoreCommand(
+                FetchTarget::uid(SequenceSet::items(...array_values($uids))),
+                $flagsToAdd,
+                '+',
+            ));
+        }
+
+        if (!empty($flagsToRemove)) {
+            $this->client->perform(new StoreCommand(
+                FetchTarget::uid(SequenceSet::items(...array_values($uids))),
+                $flagsToRemove,
+                '-',
+            ));
+        }
+    }
+
     public function entityMove(string $targetCollection, string $sourceCollection, int ...$uids): array
     {
         if (empty($uids)) {