diff --git a/AppsChat/metadata/Chat/V1/Message.php b/AppsChat/metadata/Chat/V1/Message.php
index 9c6f17aad0c3..02825f5f39b1 100644
Binary files a/AppsChat/metadata/Chat/V1/Message.php and b/AppsChat/metadata/Chat/V1/Message.php differ
diff --git a/AppsChat/src/Chat/V1/Message.php b/AppsChat/src/Chat/V1/Message.php
index 2a9ed327d956..7856cb5338ac 100644
--- a/AppsChat/src/Chat/V1/Message.php
+++ b/AppsChat/src/Chat/V1/Message.php
@@ -245,10 +245,16 @@ class Message extends \Google\Protobuf\Internal\Message
      */
     protected $deletion_metadata = null;
     /**
-     * Output only. Information about a message that's quoted by a Google Chat
-     * user in a space. Google Chat users can quote a message to reply to it.
+     * Optional. Information about a message that another message quotes.
+     * When you create a message, you can quote messages within the same
+     * thread, or quote a root message to create a new root message.
+     * However, you can't quote a message reply from a different thread.
+     * When you update a message, you can't add or replace the
+     * `quotedMessageMetadata` field, but you can remove it.
+     * For example usage, see [Quote another
+     * message](https://developers.google.com/workspace/chat/create-messages#quote-a-message).
      *
-     * Generated from protobuf field <code>.google.chat.v1.QuotedMessageMetadata quoted_message_metadata = 39 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
+     * Generated from protobuf field <code>.google.chat.v1.QuotedMessageMetadata quoted_message_metadata = 39 [(.google.api.field_behavior) = OPTIONAL];</code>
      */
     protected $quoted_message_metadata = null;
     /**
@@ -414,8 +420,14 @@ class Message extends \Google\Protobuf\Internal\Message
      *           Output only. Information about a deleted message. A message is deleted when
      *           `delete_time` is set.
      *     @type \Google\Apps\Chat\V1\QuotedMessageMetadata $quoted_message_metadata
-     *           Output only. Information about a message that's quoted by a Google Chat
-     *           user in a space. Google Chat users can quote a message to reply to it.
+     *           Optional. Information about a message that another message quotes.
+     *           When you create a message, you can quote messages within the same
+     *           thread, or quote a root message to create a new root message.
+     *           However, you can't quote a message reply from a different thread.
+     *           When you update a message, you can't add or replace the
+     *           `quotedMessageMetadata` field, but you can remove it.
+     *           For example usage, see [Quote another
+     *           message](https://developers.google.com/workspace/chat/create-messages#quote-a-message).
      *     @type array<\Google\Apps\Chat\V1\AttachedGif>|\Google\Protobuf\Internal\RepeatedField $attached_gifs
      *           Output only. GIF images that are attached to the message.
      *     @type array<\Google\Apps\Chat\V1\AccessoryWidget>|\Google\Protobuf\Internal\RepeatedField $accessory_widgets
@@ -1331,10 +1343,16 @@ public function setDeletionMetadata($var)
     }
 
     /**
-     * Output only. Information about a message that's quoted by a Google Chat
-     * user in a space. Google Chat users can quote a message to reply to it.
+     * Optional. Information about a message that another message quotes.
+     * When you create a message, you can quote messages within the same
+     * thread, or quote a root message to create a new root message.
+     * However, you can't quote a message reply from a different thread.
+     * When you update a message, you can't add or replace the
+     * `quotedMessageMetadata` field, but you can remove it.
+     * For example usage, see [Quote another
+     * message](https://developers.google.com/workspace/chat/create-messages#quote-a-message).
      *
-     * Generated from protobuf field <code>.google.chat.v1.QuotedMessageMetadata quoted_message_metadata = 39 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
+     * Generated from protobuf field <code>.google.chat.v1.QuotedMessageMetadata quoted_message_metadata = 39 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @return \Google\Apps\Chat\V1\QuotedMessageMetadata|null
      */
     public function getQuotedMessageMetadata()
@@ -1353,10 +1371,16 @@ public function clearQuotedMessageMetadata()
     }
 
     /**
-     * Output only. Information about a message that's quoted by a Google Chat
-     * user in a space. Google Chat users can quote a message to reply to it.
+     * Optional. Information about a message that another message quotes.
+     * When you create a message, you can quote messages within the same
+     * thread, or quote a root message to create a new root message.
+     * However, you can't quote a message reply from a different thread.
+     * When you update a message, you can't add or replace the
+     * `quotedMessageMetadata` field, but you can remove it.
+     * For example usage, see [Quote another
+     * message](https://developers.google.com/workspace/chat/create-messages#quote-a-message).
      *
-     * Generated from protobuf field <code>.google.chat.v1.QuotedMessageMetadata quoted_message_metadata = 39 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
+     * Generated from protobuf field <code>.google.chat.v1.QuotedMessageMetadata quoted_message_metadata = 39 [(.google.api.field_behavior) = OPTIONAL];</code>
      * @param \Google\Apps\Chat\V1\QuotedMessageMetadata $var
      * @return $this
      */
diff --git a/AppsChat/src/Chat/V1/QuotedMessageMetadata.php b/AppsChat/src/Chat/V1/QuotedMessageMetadata.php
index 776a4ab987d7..e12bff01fb75 100644
--- a/AppsChat/src/Chat/V1/QuotedMessageMetadata.php
+++ b/AppsChat/src/Chat/V1/QuotedMessageMetadata.php
@@ -9,24 +9,35 @@
 use Google\Protobuf\Internal\GPBUtil;
 
 /**
- * Information about a quoted message.
+ * Information about a message that another message quotes.
+ * When you create a message, you can quote messages within the same
+ * thread, or quote a root message to create a new root message.
+ * However, you can't quote a message reply from a different thread.
+ * When you update a message, you can't add or replace the
+ * `quotedMessageMetadata` field, but you can remove it.
+ * For example usage, see [Quote another
+ * message](https://developers.google.com/workspace/chat/create-messages#quote-a-message).
  *
  * Generated from protobuf message <code>google.chat.v1.QuotedMessageMetadata</code>
  */
 class QuotedMessageMetadata extends \Google\Protobuf\Internal\Message
 {
     /**
-     * Output only. Resource name of the quoted message.
+     * Required. Resource name of the message that is quoted.
      * Format: `spaces/{space}/messages/{message}`
      *
-     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     protected $name = '';
     /**
-     * Output only. The timestamp when the quoted message was created or when the
+     * Required. The timestamp when the quoted message was created or when the
      * quoted message was last updated.
+     * If the message was edited, use this field, `last_update_time`.
+     * If the message was never edited, use `create_time`.
+     * If `last_update_time` doesn't match the latest version of the quoted
+     * message, the request fails.
      *
-     * Generated from protobuf field <code>.google.protobuf.Timestamp last_update_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
+     * Generated from protobuf field <code>.google.protobuf.Timestamp last_update_time = 2 [(.google.api.field_behavior) = REQUIRED];</code>
      */
     protected $last_update_time = null;
 
@@ -37,11 +48,15 @@ class QuotedMessageMetadata extends \Google\Protobuf\Internal\Message
      *     Optional. Data for populating the Message object.
      *
      *     @type string $name
-     *           Output only. Resource name of the quoted message.
+     *           Required. Resource name of the message that is quoted.
      *           Format: `spaces/{space}/messages/{message}`
      *     @type \Google\Protobuf\Timestamp $last_update_time
-     *           Output only. The timestamp when the quoted message was created or when the
+     *           Required. The timestamp when the quoted message was created or when the
      *           quoted message was last updated.
+     *           If the message was edited, use this field, `last_update_time`.
+     *           If the message was never edited, use `create_time`.
+     *           If `last_update_time` doesn't match the latest version of the quoted
+     *           message, the request fails.
      * }
      */
     public function __construct($data = NULL) {
@@ -50,10 +65,10 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Output only. Resource name of the quoted message.
+     * Required. Resource name of the message that is quoted.
      * Format: `spaces/{space}/messages/{message}`
      *
-     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getName()
@@ -62,10 +77,10 @@ public function getName()
     }
 
     /**
-     * Output only. Resource name of the quoted message.
+     * Required. Resource name of the message that is quoted.
      * Format: `spaces/{space}/messages/{message}`
      *
-     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = OUTPUT_ONLY, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
@@ -78,10 +93,14 @@ public function setName($var)
     }
 
     /**
-     * Output only. The timestamp when the quoted message was created or when the
+     * Required. The timestamp when the quoted message was created or when the
      * quoted message was last updated.
+     * If the message was edited, use this field, `last_update_time`.
+     * If the message was never edited, use `create_time`.
+     * If `last_update_time` doesn't match the latest version of the quoted
+     * message, the request fails.
      *
-     * Generated from protobuf field <code>.google.protobuf.Timestamp last_update_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
+     * Generated from protobuf field <code>.google.protobuf.Timestamp last_update_time = 2 [(.google.api.field_behavior) = REQUIRED];</code>
      * @return \Google\Protobuf\Timestamp|null
      */
     public function getLastUpdateTime()
@@ -100,10 +119,14 @@ public function clearLastUpdateTime()
     }
 
     /**
-     * Output only. The timestamp when the quoted message was created or when the
+     * Required. The timestamp when the quoted message was created or when the
      * quoted message was last updated.
+     * If the message was edited, use this field, `last_update_time`.
+     * If the message was never edited, use `create_time`.
+     * If `last_update_time` doesn't match the latest version of the quoted
+     * message, the request fails.
      *
-     * Generated from protobuf field <code>.google.protobuf.Timestamp last_update_time = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
+     * Generated from protobuf field <code>.google.protobuf.Timestamp last_update_time = 2 [(.google.api.field_behavior) = REQUIRED];</code>
      * @param \Google\Protobuf\Timestamp $var
      * @return $this
      */
diff --git a/AppsChat/src/Chat/V1/Space.php b/AppsChat/src/Chat/V1/Space.php
index b7cfffae837c..3e44d9d28fc3 100644
--- a/AppsChat/src/Chat/V1/Space.php
+++ b/AppsChat/src/Chat/V1/Space.php
@@ -161,8 +161,8 @@ class Space extends \Google\Protobuf\Internal\Message
      * authentication](https://developers.google.com/workspace/chat/authenticate-authorize-chat-app)
      * and `SpaceType` is `SPACE`, otherwise should not be set.
      * In the format `customers/{customer}`, where `customer` is the `id` from the
-     * [Admin SDK customer resource](
-     * https://developers.google.com/admin-sdk/directory/reference/rest/v1/customers).
+     * [Admin SDK customer
+     * resource](https://developers.google.com/admin-sdk/directory/reference/rest/v1/customers).
      * Private apps can also use the `customers/my_customer` alias to create
      * the space in the same Google Workspace organization as the app.
      * For DMs, this field isn't populated.
@@ -273,8 +273,8 @@ class Space extends \Google\Protobuf\Internal\Message
      *           authentication](https://developers.google.com/workspace/chat/authenticate-authorize-chat-app)
      *           and `SpaceType` is `SPACE`, otherwise should not be set.
      *           In the format `customers/{customer}`, where `customer` is the `id` from the
-     *           [Admin SDK customer resource](
-     *           https://developers.google.com/admin-sdk/directory/reference/rest/v1/customers).
+     *           [Admin SDK customer
+     *           resource](https://developers.google.com/admin-sdk/directory/reference/rest/v1/customers).
      *           Private apps can also use the `customers/my_customer` alias to create
      *           the space in the same Google Workspace organization as the app.
      *           For DMs, this field isn't populated.
@@ -885,8 +885,8 @@ public function setAccessSettings($var)
      * authentication](https://developers.google.com/workspace/chat/authenticate-authorize-chat-app)
      * and `SpaceType` is `SPACE`, otherwise should not be set.
      * In the format `customers/{customer}`, where `customer` is the `id` from the
-     * [Admin SDK customer resource](
-     * https://developers.google.com/admin-sdk/directory/reference/rest/v1/customers).
+     * [Admin SDK customer
+     * resource](https://developers.google.com/admin-sdk/directory/reference/rest/v1/customers).
      * Private apps can also use the `customers/my_customer` alias to create
      * the space in the same Google Workspace organization as the app.
      * For DMs, this field isn't populated.
@@ -915,8 +915,8 @@ public function clearCustomer()
      * authentication](https://developers.google.com/workspace/chat/authenticate-authorize-chat-app)
      * and `SpaceType` is `SPACE`, otherwise should not be set.
      * In the format `customers/{customer}`, where `customer` is the `id` from the
-     * [Admin SDK customer resource](
-     * https://developers.google.com/admin-sdk/directory/reference/rest/v1/customers).
+     * [Admin SDK customer
+     * resource](https://developers.google.com/admin-sdk/directory/reference/rest/v1/customers).
      * Private apps can also use the `customers/my_customer` alias to create
      * the space in the same Google Workspace organization as the app.
      * For DMs, this field isn't populated.
diff --git a/AppsChat/src/Chat/V1/UpdateMessageRequest.php b/AppsChat/src/Chat/V1/UpdateMessageRequest.php
index 009c4836a1b1..e7ee8e19b23a 100644
--- a/AppsChat/src/Chat/V1/UpdateMessageRequest.php
+++ b/AppsChat/src/Chat/V1/UpdateMessageRequest.php
@@ -33,6 +33,7 @@ class UpdateMessageRequest extends \Google\Protobuf\Internal\Message
      * authentication](/chat/api/guides/auth/service-accounts).)
      * - `accessory_widgets`  (Requires [app
      * authentication](/chat/api/guides/auth/service-accounts).)
+     * - `quoted_message_metadata` (Only allows removal of the quoted message.)
      *
      * Generated from protobuf field <code>.google.protobuf.FieldMask update_mask = 2 [(.google.api.field_behavior) = REQUIRED];</code>
      */
@@ -67,6 +68,8 @@ class UpdateMessageRequest extends \Google\Protobuf\Internal\Message
      *                                                 - `accessory_widgets`  (Requires [app
      *                                                 authentication](/chat/api/guides/auth/service-accounts).)
      *
+     *                                                 - `quoted_message_metadata` (Only allows removal of the quoted message.)
+     *
      * @return \Google\Apps\Chat\V1\UpdateMessageRequest
      *
      * @experimental
@@ -98,6 +101,7 @@ public static function build(\Google\Apps\Chat\V1\Message $message, \Google\Prot
      *           authentication](/chat/api/guides/auth/service-accounts).)
      *           - `accessory_widgets`  (Requires [app
      *           authentication](/chat/api/guides/auth/service-accounts).)
+     *           - `quoted_message_metadata` (Only allows removal of the quoted message.)
      *     @type bool $allow_missing
      *           Optional. If `true` and the message isn't found, a new message is created
      *           and `updateMask` is ignored. The specified message ID must be
@@ -158,6 +162,7 @@ public function setMessage($var)
      * authentication](/chat/api/guides/auth/service-accounts).)
      * - `accessory_widgets`  (Requires [app
      * authentication](/chat/api/guides/auth/service-accounts).)
+     * - `quoted_message_metadata` (Only allows removal of the quoted message.)
      *
      * Generated from protobuf field <code>.google.protobuf.FieldMask update_mask = 2 [(.google.api.field_behavior) = REQUIRED];</code>
      * @return \Google\Protobuf\FieldMask|null
@@ -189,6 +194,7 @@ public function clearUpdateMask()
      * authentication](/chat/api/guides/auth/service-accounts).)
      * - `accessory_widgets`  (Requires [app
      * authentication](/chat/api/guides/auth/service-accounts).)
+     * - `quoted_message_metadata` (Only allows removal of the quoted message.)
      *
      * Generated from protobuf field <code>.google.protobuf.FieldMask update_mask = 2 [(.google.api.field_behavior) = REQUIRED];</code>
      * @param \Google\Protobuf\FieldMask $var