diff --git a/patches/015-email-mail-template.patch b/patches/015-email-mail-template.patch
index 72af74d74f97df4bc286f015c87177b1eeb1094a..646253b9ceb9ca205c295b904408975d64843e36 100644
--- a/patches/015-email-mail-template.patch
+++ b/patches/015-email-mail-template.patch
@@ -4,9 +4,23 @@ Subject: [PATCH] To implement custom email template design for calendar invite
 
 This patch is allowing to customize the email template design for invitation
 
---- ./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 @@
+--- apps/dav-4/lib/CalDAV/Schedule/IMipPlugin.php	2022-11-10 10:39:19.134653000 +0530
++++ apps/dav-4/lib/CalDAV/Schedule/iMipPluginNew.php	2022-11-25 15:05:11.443768000 +0530
+@@ -237,6 +237,13 @@
+ 		];
+
+ 		$fromEMail = Util::getDefaultEmailAddress('invitations-noreply');
++		//if sender name is empty sometimes in case of email client
++		if ($senderName === null || empty(trim($senderName))) {
++			$users = $this->userManager->getByEmail($sender);
++			if (count($users) === 1) {
++				$senderName = $users[0]->getDisplayName();
++			}
++		}
+ 		$fromName = $l10n->t('%1$s via %2$s', [$senderName, $this->defaults->getName()]);
+
+ 		$message = $this->mailer->createMessage()
+@@ -252,7 +259,21 @@
 
  		$summary = ((string) $summary !== '') ? (string) $summary : $l10n->t('Untitled event');
 
@@ -29,7 +43,7 @@ This patch is allowing to customize the email template design for invitation
  		$this->addBulletList($template, $l10n, $vevent);
 
  		// Only add response buttons to invitation requests: Fix Issue #11230
-@@ -516,6 +530,7 @@
+@@ -516,6 +537,7 @@
  		return $dtStart->format('Y-m-d') === $dtEnd->format('Y-m-d');
  	}
 
@@ -37,7 +51,7 @@ This patch is allowing to customize the email template design for invitation
  	/**
  	 * @param IEMailTemplate $template
  	 * @param IL10N $l10n
-@@ -542,24 +557,86 @@
+@@ -542,24 +564,86 @@
  	/**
  	 * @param IEMailTemplate $template
  	 * @param IL10N $l10n
@@ -79,8 +93,7 @@ This patch is allowing to customize the email template design for invitation
 +				$lastmodified=$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:'),
@@ -89,7 +102,8 @@ This patch is allowing to customize the email template design for invitation
 +				$template->addBodyListItemModified($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:'),
@@ -135,7 +149,7 @@ This patch is allowing to customize the email template design for invitation
  			$template->addBodyListItem(sprintf('<a href="%s">%s</a>',
  					htmlspecialchars($url),
  					htmlspecialchars($url)),
-@@ -567,13 +644,16 @@
+@@ -567,13 +651,16 @@
  				$this->getAbsoluteImagePath('caldav/link.png'),
  				$url,'',self::IMIP_INDENT);
  		}
@@ -158,7 +172,7 @@ This patch is allowing to customize the email template design for invitation
  		}
  	}
 
-@@ -662,7 +742,7 @@
+@@ -662,7 +749,7 @@
  										Message $iTipMessage, $lastOccurrence) {
  		$token = $this->createInvitationToken($iTipMessage, $lastOccurrence);
 
@@ -167,7 +181,7 @@ This patch is allowing to customize the email template design for invitation
  			$l10n->t('Accept'),
  			$this->urlGenerator->linkToRouteAbsolute('dav.invitation_response.accept', [
  				'token' => $token,
-@@ -670,18 +750,10 @@
+@@ -670,18 +757,10 @@
  			$l10n->t('Decline'),
  			$this->urlGenerator->linkToRouteAbsolute('dav.invitation_response.decline', [
  				'token' => $token,