diff -ur libcmis.org/inc/libcmis/session.hxx libcmis/inc/libcmis/session.hxx
--- libcmis.org/inc/libcmis/session.hxx	2021-07-27 19:09:42.580249917 +0200
+++ libcmis/inc/libcmis/session.hxx	2021-07-27 19:10:02.368249199 +0200
@@ -95,6 +95,8 @@
                 certificate exception feature available on common web browser.
               */
             virtual void setNoSSLCertificateCheck( bool noCheck ) = 0;
+
+            virtual std::string getRefreshToken() { return ""; };
     };
 }
 
diff -ur libcmis.org/src/libcmis/gdrive-session.cxx libcmis/src/libcmis/gdrive-session.cxx
--- libcmis.org/src/libcmis/gdrive-session.cxx	2021-07-27 19:09:42.581249917 +0200
+++ libcmis/src/libcmis/gdrive-session.cxx	2021-07-27 19:10:02.369249198 +0200
@@ -70,6 +70,46 @@
 {
 }
 
+
+void GDriveSession::setOAuth2Data( libcmis::OAuth2DataPtr oauth2 )
+{
+    m_oauth2Handler = new OAuth2Handler( this, oauth2 );
+    m_oauth2Handler->setOAuth2Parser( OAuth2Providers::getOAuth2Parser( getBindingUrl( ) ) );
+
+    oauth2Authenticate( );
+}
+
+void GDriveSession::oauth2Authenticate()
+{
+    // treat the supplied password as refresh token
+    if (!m_password.empty())
+    {
+        try
+        {
+            m_inOAuth2Authentication = true;
+
+            m_oauth2Handler->setRefreshToken(m_password);
+            // Try to get new access tokens using the stored refreshtoken
+            m_oauth2Handler->refresh();
+            m_inOAuth2Authentication = false;
+        }
+        catch (const CurlException &e)
+        {
+            m_inOAuth2Authentication = false;
+            // refresh token expired or invalid, trigger initial auth (that in turn will hit the fallback with copy'n'paste method)
+            BaseSession::oauth2Authenticate();
+        }
+    }
+    else
+    {
+        BaseSession::oauth2Authenticate();
+    }
+}
+
+string GDriveSession::getRefreshToken() {
+    return HttpSession::getRefreshToken();
+}
+
 libcmis::RepositoryPtr GDriveSession::getRepository( )
 {
     // Return a dummy repository since GDrive doesn't have that notion
diff -ur libcmis.org/src/libcmis/gdrive-session.hxx libcmis/src/libcmis/gdrive-session.hxx
--- libcmis.org/src/libcmis/gdrive-session.hxx	2021-07-27 19:09:42.583249917 +0200
+++ libcmis/src/libcmis/gdrive-session.hxx	2021-07-27 19:10:02.369249198 +0200
@@ -57,8 +57,14 @@
 
         virtual std::vector< libcmis::ObjectTypePtr > getBaseTypes( );
 
+        virtual std::string getRefreshToken();
+
     private:
         GDriveSession( );
+
+        virtual void setOAuth2Data( libcmis::OAuth2DataPtr oauth2 );
+
+        void oauth2Authenticate( );
 };
 
 #endif /* _GDRIVE_SESSION_HXX_ */
diff -ur libcmis.org/src/libcmis/http-session.hxx libcmis/src/libcmis/http-session.hxx
--- libcmis.org/src/libcmis/http-session.hxx	2021-07-27 19:09:42.582249917 +0200
+++ libcmis/src/libcmis/http-session.hxx	2021-07-27 19:10:02.369249198 +0200
@@ -148,7 +148,7 @@
 
         void setNoSSLCertificateCheck( bool noCheck );
 
-        std::string getRefreshToken( );
+        virtual std::string getRefreshToken( );
 
     protected:
         HttpSession( );
diff -ur libcmis.org/src/libcmis/oauth2-handler.cxx libcmis/src/libcmis/oauth2-handler.cxx
--- libcmis.org/src/libcmis/oauth2-handler.cxx	2021-07-27 19:09:42.582249917 +0200
+++ libcmis/src/libcmis/oauth2-handler.cxx	2021-07-27 19:10:02.369249198 +0200
@@ -158,6 +158,11 @@
     return m_refresh;
 }
 
+void OAuth2Handler::setRefreshToken( string refreshToken )
+{
+    m_refresh = refreshToken;
+}
+
 string OAuth2Handler::getHttpHeader( )
 {
     string header;
diff -ur libcmis.org/src/libcmis/oauth2-handler.hxx libcmis/src/libcmis/oauth2-handler.hxx
--- libcmis.org/src/libcmis/oauth2-handler.hxx	2021-07-27 19:09:42.582249917 +0200
+++ libcmis/src/libcmis/oauth2-handler.hxx	2021-07-27 19:10:02.370249198 +0200
@@ -61,6 +61,7 @@
 
         std::string getAccessToken( ) ;
         std::string getRefreshToken( ) ;
+        void setRefreshToken( std::string refreshToken ) ;
 
         // adding HTTP auth header
         std::string getHttpHeader( ) ;
diff -ur libcmis.org/src/libcmis/onedrive-session.cxx libcmis/src/libcmis/onedrive-session.cxx
--- libcmis.org/src/libcmis/onedrive-session.cxx	2021-07-27 19:09:42.583249917 +0200
+++ libcmis/src/libcmis/onedrive-session.cxx	2021-07-27 19:10:02.370249198 +0200
@@ -68,6 +68,45 @@
 {
 }
 
+void OneDriveSession::setOAuth2Data( libcmis::OAuth2DataPtr oauth2 )
+{
+    m_oauth2Handler = new OAuth2Handler( this, oauth2 );
+    m_oauth2Handler->setOAuth2Parser( OAuth2Providers::getOAuth2Parser( getBindingUrl( ) ) );
+
+    oauth2Authenticate( );
+}
+
+void OneDriveSession::oauth2Authenticate()
+{
+    // treat the supplied password as refresh token
+    if (!m_password.empty())
+    {
+        try
+        {
+            m_inOAuth2Authentication = true;
+
+            m_oauth2Handler->setRefreshToken(m_password);
+            // Try to get new access tokens using the stored refreshtoken
+            m_oauth2Handler->refresh();
+            m_inOAuth2Authentication = false;
+        }
+        catch (const CurlException &e)
+        {
+            m_inOAuth2Authentication = false;
+            // refresh token expired or invalid, trigger initial auth (that in turn will hit the fallback with copy'n'paste method)
+            BaseSession::oauth2Authenticate();
+        }
+    }
+    else
+    {
+        BaseSession::oauth2Authenticate();
+    }
+}
+
+string OneDriveSession::getRefreshToken() {
+    return HttpSession::getRefreshToken();
+}
+
 libcmis::RepositoryPtr OneDriveSession::getRepository( )
 {
     // Return a dummy repository since OneDrive doesn't have that notion
diff -ur libcmis.org/src/libcmis/onedrive-session.hxx libcmis/src/libcmis/onedrive-session.hxx
--- libcmis.org/src/libcmis/onedrive-session.hxx	2021-07-27 19:09:42.583249917 +0200
+++ libcmis/src/libcmis/onedrive-session.hxx	2021-07-27 19:10:02.370249198 +0200
@@ -62,8 +62,14 @@
 
        bool isAPathMatch( Json objectJson, std::string path );
 
+       virtual std::string getRefreshToken();
+
     private:
         OneDriveSession( );
+
+        virtual void setOAuth2Data( libcmis::OAuth2DataPtr oauth2 );
+
+        void oauth2Authenticate( );
 };
 
 #endif /* _ONEDRIVE_SESSION_HXX_ */
