option to disable settings sync

src/vs/platform/userDataSync/common/settingsSync.ts

@@ -79,6 +79,9 @@ export class SettingsSynchroniser extends Disposable implements ISynchroniser {
 	}
 
 	async sync(_continue?: boolean): Promise<boolean> {
+		if (!this.configurationService.getValue<boolean>('userConfiguration.syncSettings')) {
+			return false;
+		}
 
 		if (_continue) {
 			return this.continueSync();

src/vs/platform/userDataSync/common/userDataSync.ts

@@ -29,6 +29,12 @@ export function registerConfiguration(): IDisposable {
 				default: true,
 				scope: ConfigurationScope.APPLICATION
 			},
+			'userConfiguration.syncSettings': {
+				type: 'boolean',
+				description: localize('userConfiguration.syncSettings', "When enabled settings are synchronised while synchronising user configuration."),
+				default: true,
+				scope: ConfigurationScope.APPLICATION,
+			},
 			'userConfiguration.syncExtensions': {
 				type: 'boolean',
 				description: localize('userConfiguration.syncExtensions', "When enabled extensions are synchronised while synchronising user configuration."),