Fix #100714

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

@@ -169,7 +169,7 @@ export class UserDataAutoSyncService extends UserDataAutoSyncEnablementService i
 		try {
 
 			// Remove machine
-			if (!donotRemoveMachine) {
+			if (this.userDataSyncAccountService.account && !donotRemoveMachine) {
 				await this.userDataSyncMachinesService.removeCurrentMachine();
 			}
 

src/vs/workbench/contrib/userDataSync/browser/userDataSync.ts

@@ -569,9 +569,9 @@ export class UserDataSyncWorkbenchContribution extends Disposable implements IWo
 			message: localize('turn off sync confirmation', "Do you want to turn off sync?"),
 			detail: localize('turn off sync detail', "Your settings, keybindings, extensions and UI State will no longer be synced."),
 			primaryButton: localize('turn off', "Turn Off"),
-			checkbox: {
+			checkbox: this.userDataSyncWorkbenchService.accountStatus === AccountStatus.Available ? {
 				label: localize('turn off sync everywhere', "Turn off sync on all your devices and clear the data from the cloud.")
-			}
+			} : undefined
 		});
 		if (result.confirmed) {
 			return this.userDataSyncWorkbenchService.turnoff(!!result.checkboxChecked);