diff --git a/Dockerfile b/Dockerfile
index 9c0115e4c42b623d55785a62516c7e4f6b6e7efc..a51764971e292f635cb36079dc3a2b3fffa0d95b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,7 +15,7 @@ ARG EA_TAG="2.1.1"
 ARG ECLOUD_LAUNCHER_JOB_ID="389373"
 ARG GOOGLE_INTEGRATION_VERSION="1.0.8"
 
-RUN sed -i 's/23,0,9,1/23,0,9,19/' ${BASE_DIR}/version.php
+RUN sed -i 's/23,0,9,1/23,0,9,29/' ${BASE_DIR}/version.php
 COPY custom_entrypoint.sh /
 RUN chmod +x /custom_entrypoint.sh
 RUN mkdir -p /var/www/skeleton/Documents && mkdir -p /var/www/skeleton/Images
@@ -125,6 +125,7 @@ RUN cd ${BASE_DIR} && patch -u ${BASE_DIR}/apps/dav/lib/CalDAV/Schedule/IMipPlug
 RUN patch -u ${BASE_DIR}/core/Command/User/Setting.php -i ${TMP_PATCH_DIR}/018-occ-user-setting.patch
 RUN patch -u ${BASE_DIR}/apps/settings/lib/Sections/Personal/Groupware.php -i ${TMP_PATCH_DIR}/019-groupware.patch
 RUN patch -u ${BASE_DIR}/apps/files/js/files.js -i ${TMP_PATCH_DIR}/021-repeated-storage-dialog-fix.patch
+RUN cd ${BASE_DIR} && patch -u ${BASE_DIR}/3rdparty/sabre/vobject/lib/ITip/Broker.php -i ${TMP_PATCH_DIR}/022-significantchange.patch
 RUN rm -rf ${TMP_PATCH_DIR}
 
 # Custom theme
diff --git a/patches/015-email-mail-template.patch b/patches/015-email-mail-template.patch
index f654c784472967d88e542bf9bf7b35ed9cc807a3..f709cf027cf58c09bcb8a482aefad405028109e8 100644
--- a/patches/015-email-mail-template.patch
+++ b/patches/015-email-mail-template.patch
@@ -1,25 +1,9 @@
---- ./apps/dav/lib/CalDAV/Schedule/IMipPlugin.php	2022-10-26 11:45:19.589156800 +0530
-+++ ./apps/dav/lib/CalDAV/Schedule/iMipPluginNew.php	2022-10-26 15:28:50.269156800 +0530
-@@ -151,15 +151,6 @@
- 	 */
- 	public function schedule(Message $iTipMessage) {
- 
--		// Not sending any emails if the system considers the update
--		// insignificant.
--		if (!$iTipMessage->significantChange) {
--			if (!$iTipMessage->scheduleStatus) {
--				$iTipMessage->scheduleStatus = '1.0;We got the message, but it\'s not significant enough to warrant an email';
--			}
--			return;
--		}
--
- 		$summary = $iTipMessage->message->VEVENT->SUMMARY;
- 
- 		if (parse_url($iTipMessage->sender, PHP_URL_SCHEME) !== 'mailto') {
-@@ -252,7 +243,21 @@
- 
+--- ./apps/dav/lib/CalDAV/Schedule/IMipPlugin.php	2022-11-10 10:39:19.134653000 +0530
++++ ./apps/dav/lib/CalDAV/Schedule/iMipPluginNew.php	2022-11-11 12:28:15.829119700 +0530
+@@ -252,7 +252,21 @@
+
  		$summary = ((string) $summary !== '') ? (string) $summary : $l10n->t('Untitled event');
- 
+
 -		$this->addSubjectAndHeading($template, $l10n, $method, $summary);
 +		if ( count($vevent)>1) {
 +			$this->addSubjectAndHeadingUpdated($template, $l10n, $method, $summary);
@@ -37,17 +21,17 @@
 +			$template->addHeadingBanner('#EFFFDB','#293618',$l10n->t('This event has been updated, please review the information below:'));
 +		}
  		$this->addBulletList($template, $l10n, $vevent);
- 
+
  		// Only add response buttons to invitation requests: Fix Issue #11230
-@@ -516,6 +521,7 @@
+@@ -516,6 +530,7 @@
  		return $dtStart->format('Y-m-d') === $dtEnd->format('Y-m-d');
  	}
- 
+
 +
  	/**
  	 * @param IEMailTemplate $template
  	 * @param IL10N $l10n
-@@ -542,24 +548,86 @@
+@@ -542,24 +557,86 @@
  	/**
  	 * @param IEMailTemplate $template
  	 * @param IL10N $l10n
@@ -89,7 +73,8 @@
 +				$lastmodified=$dtstampTime;
 +				$selectedEvent = $currentevent;
 +			}
-+		}
+ 		}
+-		$meetingWhen = $this->generateWhenString($l10n, $vevent);
 +		if ($selectedEvent->SUMMARY) {
 +			if (trim($selectedEvent->SUMMARY) == trim($parentevent->SUMMARY)) {
 +				$template->addBodyListItem($selectedEvent->SUMMARY, $l10n->t('Title:'),
@@ -98,8 +83,7 @@
 +				$template->addBodyListItemModified($selectedEvent->SUMMARY, $l10n->t('Updated Title:'),
 +					$this->getAbsoluteImagePath('caldav/title.png'),'','',self::IMIP_INDENT);
 +			}
- 		}
--		$meetingWhen = $this->generateWhenString($l10n, $vevent);
++		}
 +		$meetingWhen = $this->generateWhenString($l10n, $selectedEvent);
  		if ($meetingWhen) {
 -			$template->addBodyListItem($meetingWhen, $l10n->t('Time:'),
@@ -145,7 +129,7 @@
  			$template->addBodyListItem(sprintf('<a href="%s">%s</a>',
  					htmlspecialchars($url),
  					htmlspecialchars($url)),
-@@ -567,13 +635,16 @@
+@@ -567,13 +644,16 @@
  				$this->getAbsoluteImagePath('caldav/link.png'),
  				$url,'',self::IMIP_INDENT);
  		}
@@ -167,17 +151,17 @@
 +			}
  		}
  	}
- 
-@@ -662,7 +733,7 @@
+
+@@ -662,7 +742,7 @@
  										Message $iTipMessage, $lastOccurrence) {
  		$token = $this->createInvitationToken($iTipMessage, $lastOccurrence);
- 
+
 -		$template->addBodyButtonGroup(
 +		$template->addBodyButtonGroupTentative(
  			$l10n->t('Accept'),
  			$this->urlGenerator->linkToRouteAbsolute('dav.invitation_response.accept', [
  				'token' => $token,
-@@ -670,18 +741,10 @@
+@@ -670,18 +750,10 @@
  			$l10n->t('Decline'),
  			$this->urlGenerator->linkToRouteAbsolute('dav.invitation_response.decline', [
  				'token' => $token,
@@ -197,5 +181,5 @@
 -
 -		$template->addBodyText($html, $text);
  	}
- 
+
  	/**
diff --git a/patches/022-significantchange.patch b/patches/022-significantchange.patch
new file mode 100644
index 0000000000000000000000000000000000000000..e7549ce8f3ff27e5ffe6a616268b11e57e23787a
--- /dev/null
+++ b/patches/022-significantchange.patch
@@ -0,0 +1,11 @@
+--- ./3rdparty/sabre/vobject/lib/ITip/Broker.php	2022-09-06 21:39:42.985827300 +0530
++++ ./3rdparty/sabre/vobject/lib/ITip/Broker-New.php	2022-11-11 12:45:53.449119700 +0530
+@@ -75,6 +75,8 @@
+         'RDATE',
+         'EXDATE',
+         'STATUS',
++        'SUMMARY',
++        'DESCRIPTION',
+     ];
+ 
+     /**