diff --git a/src/duplicacy_oneclient.go b/src/duplicacy_oneclient.go
index ec0358c6..9bdeb6f1 100644
--- a/src/duplicacy_oneclient.go
+++ b/src/duplicacy_oneclient.go
@@ -5,6 +5,7 @@
 package duplicacy
 
 import (
+	"context"
 	"bytes"
 	"encoding/json"
 	"fmt"
@@ -39,6 +40,7 @@ type OneDriveClient struct {
 
 	TokenFile string
 	Token     *oauth2.Token
+	OAConfig  *oauth2.Config
 	TokenLock *sync.Mutex
 
 	IsConnected bool
@@ -49,7 +51,7 @@ type OneDriveClient struct {
 	APIURL string
 }
 
-func NewOneDriveClient(tokenFile string, isBusiness bool) (*OneDriveClient, error) {
+func NewOneDriveClient(tokenFile string, isBusiness bool, client_id string, client_secret string) (*OneDriveClient, error) {
 
 	description, err := ioutil.ReadFile(tokenFile)
 	if err != nil {
@@ -65,10 +67,25 @@ func NewOneDriveClient(tokenFile string, isBusiness bool) (*OneDriveClient, erro
 		HTTPClient: http.DefaultClient,
 		TokenFile:  tokenFile,
 		Token:      token,
+		OAConfig:	nil,
 		TokenLock:  &sync.Mutex{},
 		IsBusiness: isBusiness,
 	}
 
+	if (client_id != "") {
+	    oneOauthConfig := oauth2.Config{
+	        ClientID: 		client_id,
+	        ClientSecret: 	client_secret,
+	        Scopes:       	[]string{"Files.ReadWrite", "offline_access"},
+	        Endpoint: oauth2.Endpoint{
+	            AuthURL:  "https://login.microsoftonline.com/common/oauth2/v2.0/authorize",
+	            TokenURL: "https://login.microsoftonline.com/common/oauth2/v2.0/token",
+	        },
+	    }
+
+		client.OAConfig = &oneOauthConfig
+	}
+
 	if isBusiness {
 		client.RefreshTokenURL = "https://duplicacy.com/odb_refresh"
 		client.APIURL = "https://graph.microsoft.com/v1.0/me"
@@ -218,15 +235,25 @@ func (client *OneDriveClient) RefreshToken(force bool) (err error) {
 		return nil
 	}
 
-	readCloser, _, err := client.call(client.RefreshTokenURL, "POST", client.Token, "")
-	if err != nil {
-		return fmt.Errorf("failed to refresh the access token: %v", err)
-	}
+	if (client.OAConfig == nil) {
+		readCloser, _, err := client.call(client.RefreshTokenURL, "POST", client.Token, "")
+		if err != nil {
+			return fmt.Errorf("failed to refresh the access token: %v", err)
+		}
 
-	defer readCloser.Close()
+		defer readCloser.Close()
 
-	if err = json.NewDecoder(readCloser).Decode(client.Token); err != nil {
-		return err
+		if err = json.NewDecoder(readCloser).Decode(client.Token); err != nil {
+			return err
+		}
+	} else {
+		ctx := context.Background()
+		tokenSource := client.OAConfig.TokenSource(ctx, client.Token)
+	    token, err := tokenSource.Token()
+	    if err != nil {
+	        return fmt.Errorf("failed to refresh the access token: %v", err)
+	    }
+	    client.Token = token
 	}
 
 	description, err := json.Marshal(client.Token)
diff --git a/src/duplicacy_onestorage.go b/src/duplicacy_onestorage.go
index e6cb9c21..2e24333c 100644
--- a/src/duplicacy_onestorage.go
+++ b/src/duplicacy_onestorage.go
@@ -19,13 +19,13 @@ type OneDriveStorage struct {
 }
 
 // CreateOneDriveStorage creates an OneDrive storage object.
-func CreateOneDriveStorage(tokenFile string, isBusiness bool, storagePath string, threads int) (storage *OneDriveStorage, err error) {
+func CreateOneDriveStorage(tokenFile string, isBusiness bool, storagePath string, threads int, client_id string, client_secret string) (storage *OneDriveStorage, err error) {
 
 	for len(storagePath) > 0 && storagePath[len(storagePath)-1] == '/' {
 		storagePath = storagePath[:len(storagePath)-1]
 	}
 
-	client, err := NewOneDriveClient(tokenFile, isBusiness)
+	client, err := NewOneDriveClient(tokenFile, isBusiness, client_id, client_secret)
 	if err != nil {
 		return nil, err
 	}
diff --git a/src/duplicacy_storage.go b/src/duplicacy_storage.go
index e098026c..e97f42d4 100644
--- a/src/duplicacy_storage.go
+++ b/src/duplicacy_storage.go
@@ -647,12 +647,28 @@ func CreateStorage(preference Preference, resetPassword bool, threads int) (stor
 		storagePath := matched[3] + matched[4]
 		prompt := fmt.Sprintf("Enter the path of the OneDrive token file (downloadable from https://duplicacy.com/one_start):")
 		tokenFile := GetPassword(preference, matched[1] + "_token", prompt, true, resetPassword)
-		oneDriveStorage, err := CreateOneDriveStorage(tokenFile, matched[1] == "odb", storagePath, threads)
+
+		// client_id, just like tokenFile, can be stored in preferences
+		//prompt = fmt.Sprintf("Enter client_id for custom Azure app (if empty will use duplicacy.com one):")
+		client_id := GetPasswordFromPreference(preference, matched[1] + "_client_id")
+		client_secret := ""
+
+		if client_id != "" {
+			// client_secret should go into keyring
+			prompt = fmt.Sprintf("Enter client_secret for custom Azure app (if empty will use duplicacy.com one):")
+			client_secret = GetPassword(preference, matched[1] + "_client_secret", prompt, true, resetPassword)
+		}
+
+		oneDriveStorage, err := CreateOneDriveStorage(tokenFile, matched[1] == "odb", storagePath, threads, client_id, client_secret)
 		if err != nil {
 			LOG_ERROR("STORAGE_CREATE", "Failed to load the OneDrive storage at %s: %v", storageURL, err)
 			return nil
 		}
+
 		SavePassword(preference, matched[1] + "_token", tokenFile)
+		if client_id != "" {
+			SavePassword(preference, matched[1] + "_client_secret", client_secret)
+		}
 		return oneDriveStorage
 	} else if matched[1] == "hubic" {
 		storagePath := matched[3] + matched[4]