diff --git a/Linphone/core/conference/ConferenceInfoCore.cpp b/Linphone/core/conference/ConferenceInfoCore.cpp
index 865bf7237..c6c45a986 100644
--- a/Linphone/core/conference/ConferenceInfoCore.cpp
+++ b/Linphone/core/conference/ConferenceInfoCore.cpp
@@ -660,7 +660,7 @@ bool ConferenceInfoCore::isAllDayConf() const {
 }
 
 void ConferenceInfoCore::exportConferenceToICS() {
-	// Collect participant addresses to look up display names
+	// Collect participant addresses
 	QStringList participantAddresses;
 	for (const auto &participant : mParticipants) {
 		auto map = participant.toMap();
@@ -679,159 +679,96 @@ void ConferenceInfoCore::exportConferenceToICS() {
 	QDateTime dateTime = mDateTime;
 	QDateTime endDateTime = mEndDateTime;
 
-	// Look up display names from friend list in model thread
+	// Generate ICS on model thread (for display name lookup) then open file
 	App::postModelAsync(
 	    [participantAddresses, uri, organizerAddress, organizerName, subject, description, dateTime, endDateTime]() {
-		    // Helper to extract phone number from SIP address
-		    auto extractPhoneNumber = [](const QString &address) -> QString {
-			    QString addr = address;
-			    if (addr.startsWith("sip:", Qt::CaseInsensitive)) {
-				    addr = addr.mid(4);
-			    } else if (addr.startsWith("sips:", Qt::CaseInsensitive)) {
-				    addr = addr.mid(5);
-			    }
-			    int atIndex = addr.indexOf('@');
-			    if (atIndex > 0) {
-				    return addr.left(atIndex);
-			    }
-			    return addr;
+		    // Helper lambda to escape special characters in ICS text fields
+		    auto escapeIcsText = [](const QString &text) {
+			    QString escaped = text;
+			    escaped.replace("\\", "\\\\");
+			    escaped.replace(";", "\\;");
+			    escaped.replace(",", "\\,");
+			    escaped.replace("\n", "\\n");
+			    return escaped;
 		    };
 
-		    // Build map of address -> display name
-		    QMap<QString, QString> displayNames;
-		    auto appFriendList = ToolModel::getAppFriendList();
+		    // Helper lambda to format datetime in ICS format (UTC)
+		    auto formatIcsDateTime = [](const QDateTime &dt) { return dt.toUTC().toString("yyyyMMdd'T'HHmmss'Z'"); };
 
-		    for (const QString &address : participantAddresses) {
-			    QString displayName;
-
-			    // First try standard lookup by address
-			    auto linFriend = ToolModel::findFriendByAddress(address);
-			    if (linFriend) {
-				    displayName = Utils::coreStringToAppString(linFriend->getName());
-			    }
-
-			    // If not found, search by phone number in friend list
-			    if (displayName.isEmpty() && appFriendList) {
-				    QString phoneNumber = extractPhoneNumber(address);
-				    if (!phoneNumber.isEmpty()) {
-					    // Iterate through all friends and check their phone numbers
-					    for (const auto &friendEntry : appFriendList->getFriends()) {
-						    auto friendPhoneNumbers = friendEntry->getPhoneNumbers();
-						    for (const auto &friendPhone : friendPhoneNumbers) {
-							    QString friendPhoneStr = Utils::coreStringToAppString(friendPhone);
-							    // Normalize both numbers for comparison (digits only)
-							    QString normalizedFriendPhone = friendPhoneStr;
-							    QString normalizedSearchPhone = phoneNumber;
-							    normalizedFriendPhone.remove(QRegularExpression("[^0-9]"));
-							    normalizedSearchPhone.remove(QRegularExpression("[^0-9]"));
-							    // Check if phone numbers match
-							    if (friendPhoneStr == phoneNumber || normalizedFriendPhone == normalizedSearchPhone) {
-								    displayName = Utils::coreStringToAppString(friendEntry->getName());
-								    break;
-							    }
-						    }
-						    if (!displayName.isEmpty()) break;
-					    }
-				    }
-			    }
-
-			    // Fallback to phone number if no display name found
-			    if (displayName.isEmpty()) {
-				    displayName = extractPhoneNumber(address);
-			    }
-
-			    displayNames[address] = displayName;
+		    // Generate a unique UID based on URI or datetime + organizer
+		    QString uid;
+		    if (!uri.isEmpty()) {
+			    uid = uri;
+			    uid.replace("sip:", "").replace("@", "-at-");
+		    } else {
+			    uid = dateTime.toUTC().toString("yyyyMMddHHmmss") + "-" + organizerAddress;
+			    uid.replace("sip:", "").replace("@", "-at-");
 		    }
 
-		    // Write ICS file in main thread
-		    App::postCoreAsync([participantAddresses, displayNames, uri, organizerAddress, organizerName, subject,
-		                        description, dateTime, endDateTime]() {
-			    QString filePath(Paths::getAppLocalDirPath() + "conference.ics");
-			    QFile file(filePath);
-			    if (file.open(QIODevice::WriteOnly | QIODevice::Text)) {
-				    QTextStream out(&file);
+		    // Build the ICS content
+		    QString icsContent;
+		    QTextStream out(&icsContent);
 
-				    // Helper lambda to escape special characters in ICS text fields
-				    auto escapeIcsText = [](const QString &text) {
-					    QString escaped = text;
-					    escaped.replace("\\", "\\\\");
-					    escaped.replace(";", "\\;");
-					    escaped.replace(",", "\\,");
-					    escaped.replace("\n", "\\n");
-					    return escaped;
-				    };
+		    out << "BEGIN:VCALENDAR\r\n";
+		    out << "VERSION:2.0\r\n";
+		    out << "PRODID:-//Titanium Comms//EN\r\n";
+		    out << "METHOD:REQUEST\r\n";
+		    out << "BEGIN:VEVENT\r\n";
 
-				    // Helper lambda to format datetime in ICS format (UTC)
-				    auto formatIcsDateTime = [](const QDateTime &dt) {
-					    return dt.toUTC().toString("yyyyMMdd'T'HHmmss'Z'");
-				    };
+		    // UID and timestamps
+		    out << "UID:" << uid << "\r\n";
+		    out << "DTSTAMP:" << formatIcsDateTime(QDateTime::currentDateTimeUtc()) << "\r\n";
+		    out << "DTSTART:" << formatIcsDateTime(dateTime) << "\r\n";
+		    out << "DTEND:" << formatIcsDateTime(endDateTime) << "\r\n";
 
-				    // Generate a unique UID based on URI or datetime + organizer
-				    QString uid;
-				    if (!uri.isEmpty()) {
-					    uid = uri;
-					    uid.replace("sip:", "").replace("@", "-at-");
-				    } else {
-					    uid = dateTime.toUTC().toString("yyyyMMddHHmmss") + "-" + organizerAddress;
-					    uid.replace("sip:", "").replace("@", "-at-");
-				    }
-
-				    // Build the ICS content
-				    out << "BEGIN:VCALENDAR\r\n";
-				    out << "VERSION:2.0\r\n";
-				    out << "PRODID:-//Titanium Comms//EN\r\n";
-				    out << "METHOD:REQUEST\r\n";
-				    out << "BEGIN:VEVENT\r\n";
-
-				    // UID and timestamps
-				    out << "UID:" << uid << "\r\n";
-				    out << "DTSTAMP:" << formatIcsDateTime(QDateTime::currentDateTimeUtc()) << "\r\n";
-				    out << "DTSTART:" << formatIcsDateTime(dateTime) << "\r\n";
-				    out << "DTEND:" << formatIcsDateTime(endDateTime) << "\r\n";
-
-				    // Organizer
-				    if (!organizerAddress.isEmpty()) {
-					    out << "ORGANIZER";
-					    if (!organizerName.isEmpty()) {
-						    out << ";CN=" << escapeIcsText(organizerName);
-					    }
-					    out << ":" << organizerAddress << "\r\n";
-				    }
-
-				    // Attendees/Participants
-				    for (const QString &address : participantAddresses) {
-					    QString displayName = displayNames.value(address);
-					    out << "ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE";
-					    if (!displayName.isEmpty()) {
-						    out << ";CN=" << escapeIcsText(displayName);
-					    }
-					    out << ":" << address << "\r\n";
-				    }
-
-				    // Subject/Summary
-				    if (!subject.isEmpty()) {
-					    out << "SUMMARY:" << escapeIcsText(subject) << "\r\n";
-				    }
-
-				    // Description
-				    if (!description.isEmpty()) {
-					    out << "DESCRIPTION:" << escapeIcsText(description) << "\r\n";
-				    }
-
-				    // Location (conference URI)
-				    if (!uri.isEmpty()) {
-					    out << "LOCATION:" << uri << "\r\n";
-					    out << "URL:" << uri << "\r\n";
-				    }
-
-				    out << "STATUS:CONFIRMED\r\n";
-				    out << "SEQUENCE:0\r\n";
-				    out << "END:VEVENT\r\n";
-				    out << "END:VCALENDAR\r\n";
-
-				    file.close();
+		    // Organizer
+		    if (!organizerAddress.isEmpty()) {
+			    out << "ORGANIZER";
+			    if (!organizerName.isEmpty()) {
+				    out << ";CN=" << escapeIcsText(organizerName);
 			    }
-			    QDesktopServices::openUrl(QUrl::fromLocalFile(filePath));
-		    });
+			    out << ":" << organizerAddress << "\r\n";
+		    }
+
+		    // Attendees/Participants
+		    for (const QString &address : participantAddresses) {
+			    QString displayName = ToolModel::getDisplayName(address);
+			    out << "ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE";
+			    if (!displayName.isEmpty()) {
+				    out << ";CN=" << escapeIcsText(displayName);
+			    }
+			    out << ":" << address << "\r\n";
+		    }
+
+		    // Subject/Summary
+		    if (!subject.isEmpty()) {
+			    out << "SUMMARY:" << escapeIcsText(subject) << "\r\n";
+		    }
+
+		    // Description
+		    if (!description.isEmpty()) {
+			    out << "DESCRIPTION:" << escapeIcsText(description) << "\r\n";
+		    }
+
+		    // Location (conference URI)
+		    if (!uri.isEmpty()) {
+			    out << "LOCATION:" << uri << "\r\n";
+			    out << "URL:" << uri << "\r\n";
+		    }
+
+		    out << "STATUS:CONFIRMED\r\n";
+		    out << "SEQUENCE:0\r\n";
+		    out << "END:VEVENT\r\n";
+		    out << "END:VCALENDAR\r\n";
+
+		    // Write the file and open it
+		    QString filePath(Paths::getAppLocalDirPath() + "conference.ics");
+		    QFile file(filePath);
+		    if (file.open(QIODevice::WriteOnly | QIODevice::Text)) {
+			    QTextStream fileOut(&file);
+			    fileOut << icsContent;
+			    file.close();
+		    }
+		    QDesktopServices::openUrl(QUrl::fromLocalFile(filePath));
 	    });
 }