diff --git a/.patches/sabre-vobject-iTipBroker-replies.patch b/.patches/sabre-vobject-iTipBroker-replies.patch
new file mode 100644
index 000000000..b335b84eb
--- /dev/null
+++ b/.patches/sabre-vobject-iTipBroker-replies.patch
@@ -0,0 +1,51 @@
+From 49d53f187089ec9a67917e564a87c6dea89ea839 Mon Sep 17 00:00:00 2001
+From: SebastianKrupinski <krupinskis05@gmail.com>
+Date: Tue, 30 Dec 2025 13:48:29 -0500
+Subject: [PATCH] fix: send participation reply on fresh event
+
+Signed-off-by: SebastianKrupinski <krupinskis05@gmail.com>
+---
+ lib/ITip/Broker.php                           | 25 ++++++---
+ .../VObject/ITip/BrokerAttendeeReplyTest.php  | 52 +++++++++++++++++++
+ 2 files changed, 71 insertions(+), 6 deletions(-)
+
+diff --git a/lib/ITip/Broker.php b/lib/ITip/Broker.php
+index 76ee0c71..e621c6e2 100644
+--- a/lib/ITip/Broker.php
++++ b/lib/ITip/Broker.php
+@@ -246,16 +246,29 @@ public function parseEvent($calendar, $userHref, $oldCalendar = null): array
+             $baseCalendar = $oldCalendar;
+         }
+ 
++        // Check if the user is the organizer
+         if (in_array($eventInfo['organizer'], $userHref)) {
+             return $this->parseEventForOrganizer($baseCalendar, $eventInfo, $oldEventInfo);
+-        } elseif ($oldCalendar) {
+-            // We need to figure out if the user is an attendee, but we're only
+-            // doing so if there's an oldCalendar, because we only want to
+-            // process updates, not creation of new events.
+-            foreach ($eventInfo['attendees'] as $attendee) {
+-                if (in_array($attendee['href'], $userHref)) {
++        }
++
++        // Check if the user is an attendee
++        foreach ($eventInfo['attendees'] as $attendee) {
++            if (in_array($attendee['href'], $userHref)) {
++                // If this is a event update, we always generate a reply
++                if ($oldCalendar) {
+                     return $this->parseEventForAttendee($baseCalendar, $eventInfo, $oldEventInfo, $attendee['href']);
+                 }
++
++                // If this is a new event, we only generate a reply if the participation status is set
++                foreach ($attendee['instances'] as $instance) {
++                    if (isset($instance['partstat']) && 'NEEDS-ACTION' !== $instance['partstat']) {
++                        // Attendee has responded (ACCEPTED/DECLINED/TENTATIVE) - generate REPLY
++                        return $this->parseEventForAttendee($baseCalendar, $eventInfo, $oldEventInfo, $attendee['href']);
++                    }
++                }
++
++                // User is attendee but no response to process
++                break;
+             }
+         }
+ 
\ No newline at end of file
diff --git a/composer.patches.json b/composer.patches.json
index 73fb07c30..7a0dbe4cc 100644
--- a/composer.patches.json
+++ b/composer.patches.json
@@ -8,7 +8,8 @@
 			"Check for instanceof INode instead of Node": ".patches/check-for-instanceof-INode-instead-of-Node-1595.patch"
 		},
 		"sabre/vobject": {
-			"fix use RDATE in time range check and use all instances": ".patches/sabre-vobject-rdate.patch"
+			"fix use RDATE in time range check and use all instances": ".patches/sabre-vobject-rdate.patch",
+			"fix send participation reply on fresh event": ".patches/sabre-vobject-iTipBroker-replies.patch"
 		}
 	}
 }
diff --git a/sabre/vobject/PATCHES.txt b/sabre/vobject/PATCHES.txt
index 9cc99e5bd..358e87a0c 100644
--- a/sabre/vobject/PATCHES.txt
+++ b/sabre/vobject/PATCHES.txt
@@ -5,3 +5,7 @@ fix use RDATE in time range check and use all instances
 Source: .patches/sabre-vobject-rdate.patch
 
 
+fix send participation reply on fresh event
+Source: .patches/sabre-vobject-iTipBroker-replies.patch
+
+
diff --git a/sabre/vobject/lib/ITip/Broker.php b/sabre/vobject/lib/ITip/Broker.php
index 9d68fc4c6..80be2a852 100644
--- a/sabre/vobject/lib/ITip/Broker.php
+++ b/sabre/vobject/lib/ITip/Broker.php
@@ -240,16 +240,29 @@ public function parseEvent($calendar, $userHref, $oldCalendar = null)
             $baseCalendar = $oldCalendar;
         }
 
+        // Check if the user is the organizer
         if (in_array($eventInfo['organizer'], $userHref)) {
             return $this->parseEventForOrganizer($baseCalendar, $eventInfo, $oldEventInfo);
-        } elseif ($oldCalendar) {
-            // We need to figure out if the user is an attendee, but we're only
-            // doing so if there's an oldCalendar, because we only want to
-            // process updates, not creation of new events.
-            foreach ($eventInfo['attendees'] as $attendee) {
-                if (in_array($attendee['href'], $userHref)) {
+        }
+
+        // Check if the user is an attendee
+        foreach ($eventInfo['attendees'] as $attendee) {
+            if (in_array($attendee['href'], $userHref)) {
+                // If this is a event update, we always generate a reply
+                if ($oldCalendar) {
                     return $this->parseEventForAttendee($baseCalendar, $eventInfo, $oldEventInfo, $attendee['href']);
                 }
+
+                // If this is a new event, we only generate a reply if the participation status is set
+                foreach ($attendee['instances'] as $instance) {
+                    if (isset($instance['partstat']) && 'NEEDS-ACTION' !== $instance['partstat']) {
+                        // Attendee has responded (ACCEPTED/DECLINED/TENTATIVE) - generate REPLY
+                        return $this->parseEventForAttendee($baseCalendar, $eventInfo, $oldEventInfo, $attendee['href']);
+                    }
+                }
+
+                // User is attendee but no response to process
+                break;
             }
         }