diff --git a/src/common/utility.cpp b/src/common/utility.cpp
index 7df0d7d73b085..c1ada05e36868 100644
--- a/src/common/utility.cpp
+++ b/src/common/utility.cpp
@@ -151,16 +151,17 @@ static QLatin1String platform()
 #endif
 }
 
-QByteArray Utility::userAgentString()
-{
-    return QStringLiteral("Mozilla/5.0 (%1) mirall/%2 (%3, %4-%5 ClientArchitecture: %6 OsArchitecture: %7)")
-        .arg(platform(),
-            QStringLiteral(MIRALL_VERSION_STRING),
-            qApp->applicationName(),
-            QSysInfo::productType(),
-            QSysInfo::kernelVersion(),
-            QSysInfo::buildCpuArchitecture(),
-            QSysInfo::currentCpuArchitecture())
+QByteArray Utility::userAgentString(const QString &synchronizationType)
+{
+    return QStringLiteral("Mozilla/5.0 (%1) mirall/%2 (%3, %4-%5 ClientArchitecture: %6 OsArchitecture: %7 SyncType: %8)")
+    .arg(platform(),
+         QStringLiteral(MIRALL_VERSION_STRING),
+         qApp->applicationName(),
+         QSysInfo::productType(),
+         QSysInfo::kernelVersion(),
+         QSysInfo::buildCpuArchitecture(),
+         QSysInfo::currentCpuArchitecture(),
+         synchronizationType)
         .toLatin1();
 }
 
diff --git a/src/common/utility.h b/src/common/utility.h
index dc51338ea146a..4176553dc10d2 100644
--- a/src/common/utility.h
+++ b/src/common/utility.h
@@ -68,7 +68,7 @@ namespace Utility {
 
     OCSYNC_EXPORT bool writeRandomFile(const QString &fname, int size = -1);
     OCSYNC_EXPORT QString octetsToString(const qint64 octets);
-    OCSYNC_EXPORT QByteArray userAgentString();
+    OCSYNC_EXPORT QByteArray userAgentString(const QString &synchronizationType);
     OCSYNC_EXPORT QByteArray friendlyUserAgentString();
     /**
       * @brief Return whether launch on startup is enabled system wide.
diff --git a/src/gui/creds/webflowcredentials.cpp b/src/gui/creds/webflowcredentials.cpp
index 9f77b69ff5c88..b9bfeda5b57b3 100644
--- a/src/gui/creds/webflowcredentials.cpp
+++ b/src/gui/creds/webflowcredentials.cpp
@@ -46,6 +46,7 @@ class WebFlowCredentialsAccessManager : public AccessManager
         : AccessManager(parent)
         , _cred(cred)
     {
+        setSynchronizationType(QStringLiteral("login"));
     }
 
 protected:
diff --git a/src/gui/systray.cpp b/src/gui/systray.cpp
index 6ed0b78399682..e075f337fd73e 100644
--- a/src/gui/systray.cpp
+++ b/src/gui/systray.cpp
@@ -972,6 +972,7 @@ AccessManagerFactory::AccessManagerFactory()
 QNetworkAccessManager* AccessManagerFactory::create(QObject *parent)
 {
     const auto am = new AccessManager(parent);
+    am->setSynchronizationType(QStringLiteral("Systray"));
     const auto diskCache = new QNetworkDiskCache(am);
     diskCache->setCacheDirectory(QStandardPaths::writableLocation(QStandardPaths::CacheLocation));
     am->setCache(diskCache);
diff --git a/src/gui/updater/ocupdater.cpp b/src/gui/updater/ocupdater.cpp
index febe136816168..03455cd92f0c2 100644
--- a/src/gui/updater/ocupdater.cpp
+++ b/src/gui/updater/ocupdater.cpp
@@ -81,6 +81,7 @@ OCUpdater::OCUpdater(const QUrl &url)
     , _accessManager(new AccessManager(this))
     , _timeoutWatchdog(new QTimer(this))
 {
+    _accessManager->setSynchronizationType(QStringLiteral("updater"));
 }
 
 void OCUpdater::setUpdateUrl(const QUrl &url)
@@ -248,6 +249,10 @@ bool OCUpdater::updateSucceeded() const
     return currentVersion >= targetVersionInt;
 }
 
+QNetworkAccessManager *OCUpdater::qnam() const {
+    return _accessManager;
+}
+
 void OCUpdater::slotVersionInfoArrived()
 {
     qCDebug(lcUpdater) << "received a reply";
diff --git a/src/gui/updater/ocupdater.h b/src/gui/updater/ocupdater.h
index 25c477b6864dd..c5498e5a6e360 100644
--- a/src/gui/updater/ocupdater.h
+++ b/src/gui/updater/ocupdater.h
@@ -73,6 +73,8 @@ private slots:
     QTimer _updateCheckTimer; /** Timer for the regular update check. */
 };
 
+class AccessManager;
+
 /**
  * @brief Class that uses an ownCloud proprietary XML format to fetch update information
  * @ingroup gui
@@ -126,13 +128,13 @@ private slots:
 protected:
     virtual void versionInfoArrived(const UpdateInfo &info) = 0;
     [[nodiscard]] bool updateSucceeded() const;
-    [[nodiscard]] QNetworkAccessManager *qnam() const { return _accessManager; }
+    [[nodiscard]] QNetworkAccessManager *qnam() const;
     [[nodiscard]] UpdateInfo updateInfo() const { return _updateInfo; }
 
 private:
     QUrl _updateUrl;
     int _state = Unknown;
-    QNetworkAccessManager *_accessManager;
+    AccessManager *_accessManager;
     QTimer *_timeoutWatchdog; /** Timer to guard the timeout of an individual network request */
     UpdateInfo _updateInfo;
 };
diff --git a/src/gui/wizard/webview.cpp b/src/gui/wizard/webview.cpp
index 8e661a0b6a82d..3fdb170b63359 100644
--- a/src/gui/wizard/webview.cpp
+++ b/src/gui/wizard/webview.cpp
@@ -88,7 +88,7 @@ WebView::WebView(QWidget *parent)
     _interceptor = new WebViewPageUrlRequestInterceptor(this);
     _schemeHandler = new WebViewPageUrlSchemeHandler(this);
 
-    const QString userAgent(Utility::userAgentString());
+    const QString userAgent(Utility::userAgentString(QStringLiteral("login")));
     _profile->setHttpUserAgent(userAgent);
     QWebEngineProfile::defaultProfile()->setHttpUserAgent(userAgent);
     _profile->setUrlRequestInterceptor(_interceptor);
diff --git a/src/libsync/accessmanager.cpp b/src/libsync/accessmanager.cpp
index 6ad08940ad03f..67c9f8f833ae9 100644
--- a/src/libsync/accessmanager.cpp
+++ b/src/libsync/accessmanager.cpp
@@ -38,6 +38,16 @@ AccessManager::AccessManager(QObject *parent)
     });
 }
 
+const QString &AccessManager::synchronizationType() const
+{
+    return _synchronizationType;
+}
+
+void AccessManager::setSynchronizationType(const QString &type)
+{
+    _synchronizationType = type;
+}
+
 QByteArray AccessManager::generateRequestId()
 {
     return QUuid::createUuid().toByteArray(QUuid::WithoutBraces);
@@ -49,7 +59,8 @@ QNetworkReply *AccessManager::createRequest(QNetworkAccessManager::Operation op,
 
     // Respect request specific user agent if any
     if (!newRequest.header(QNetworkRequest::UserAgentHeader).isValid()) {
-        newRequest.setHeader(QNetworkRequest::UserAgentHeader, Utility::userAgentString());
+        Q_ASSERT(!_synchronizationType.isEmpty());
+        newRequest.setHeader(QNetworkRequest::UserAgentHeader, Utility::userAgentString(_synchronizationType));
     }
 
     // Some firewalls reject requests that have a "User-Agent" but no "Accept" header
diff --git a/src/libsync/accessmanager.h b/src/libsync/accessmanager.h
index 7b2a16e05f531..afd86addba2ee 100644
--- a/src/libsync/accessmanager.h
+++ b/src/libsync/accessmanager.h
@@ -28,8 +28,15 @@ class OWNCLOUDSYNC_EXPORT AccessManager : public QNetworkAccessManager
 
     AccessManager(QObject *parent = nullptr);
 
+    [[nodiscard]] const QString& synchronizationType() const;
+
+    void setSynchronizationType(const QString &type);
+
 protected:
     QNetworkReply *createRequest(QNetworkAccessManager::Operation op, const QNetworkRequest &request, QIODevice *outgoingData = nullptr) override;
+
+private:
+    QString _synchronizationType;
 };
 
 } // namespace OCC
diff --git a/src/libsync/account.cpp b/src/libsync/account.cpp
index fa620bb25fc1d..99ae6403de106 100644
--- a/src/libsync/account.cpp
+++ b/src/libsync/account.cpp
@@ -284,6 +284,11 @@ void Account::setCredentials(AbstractCredentials *cred)
     // processing slotHandleSslErrors().
     _networkAccessManager = QSharedPointer<QNetworkAccessManager>(_credentials->createQNAM(), &QObject::deleteLater);
 
+    const auto accessManager = qobject_cast<AccessManager*>(_networkAccessManager.get());
+    if (accessManager) {
+        accessManager->setSynchronizationType(QStringLiteral("account"));
+    }
+
     if (jar) {
         _networkAccessManager->setCookieJar(jar);
     }
@@ -414,6 +419,11 @@ void Account::resetNetworkAccessManager()
     // Make it call deleteLater to make sure that we can return to any QNAM stack frames safely.
     _networkAccessManager = QSharedPointer<QNetworkAccessManager>(_credentials->createQNAM(), &QObject::deleteLater);
 
+    const auto accessManager = qobject_cast<AccessManager*>(_networkAccessManager.get());
+    if (accessManager) {
+        accessManager->setSynchronizationType(QStringLiteral("account"));
+    }
+
     _networkAccessManager->setCookieJar(jar); // takes ownership of the old cookie jar
     _networkAccessManager->setProxy(proxy);   // Remember proxy (issue #2108)
 
@@ -1132,6 +1142,16 @@ void Account::setEncryptionCertificateFingerprint(const QByteArray &fingerprint)
     Q_EMIT wantsAccountSaved(sharedFromThis());
 }
 
+const QString &Account::synchronizationType() const
+{
+    return static_cast<AccessManager*>(_networkAccessManager.get())->synchronizationType();
+}
+
+void Account::setSynchronizationType(const QString &type)
+{
+    static_cast<AccessManager*>(_networkAccessManager.get())->setSynchronizationType(type);
+}
+
 void Account::setAskUserForMnemonic(const bool ask)
 {
     _e2eAskUserForMnemonic = ask;
diff --git a/src/libsync/account.h b/src/libsync/account.h
index eaa636b3ad0e3..144fce44ca73d 100644
--- a/src/libsync/account.h
+++ b/src/libsync/account.h
@@ -418,6 +418,10 @@ class OWNCLOUDSYNC_EXPORT Account : public QObject
     [[nodiscard]] QByteArray encryptionCertificateFingerprint() const;
     void setEncryptionCertificateFingerprint(const QByteArray &fingerprint);
 
+    [[nodiscard]] const QString& synchronizationType() const;
+
+    void setSynchronizationType(const QString &type);
+
 public slots:
     /// Used when forgetting credentials
     void clearQNAMCache();
diff --git a/src/libsync/syncengine.cpp b/src/libsync/syncengine.cpp
index 23dd4b9f26b80..d784952641efa 100644
--- a/src/libsync/syncengine.cpp
+++ b/src/libsync/syncengine.cpp
@@ -583,7 +583,18 @@ void SyncEngine::startSync()
 
     verStr.append(" SSL library ").append(QSslSocket::sslLibraryVersionString().toUtf8().data());
     verStr.append(" on ").append(Utility::platformName());
-    qCInfo(lcEngine) << verStr;
+    qCInfo(lcEngine) << verStr << "vfs mode: " << _syncOptions._vfs->mode();
+
+    switch (_syncOptions._vfs->mode())
+    {
+    case Vfs::Off:
+        _account->setSynchronizationType(QStringLiteral("classical"));
+    case Vfs::WithSuffix:
+    case Vfs::WindowsCfApi:
+    case Vfs::XAttr:
+        _account->setSynchronizationType(QStringLiteral("virtual"));
+        break;
+    }
 
     // This creates the DB if it does not exist yet.
     if (!_journal->open()) {