Skip to content
Novaz AuthenticatorGET

Ajax Systems 2FA: how to set up an authenticator app

By the Novaz team · Updated October 29, 2026
Novaz steps checked against version 1.0.5

On this page
  1. Before you start
  2. Turn on 2FA with an authenticator app
  3. When Ajax asks for a code
  4. If Ajax rejects your code
  5. If you lose your authenticator
  6. Changing phones or turning 2FA off
  7. Official Ajax Systems help

Your Ajax account is what the Ajax Security System app signs in to, and it controls your Ajax alarm. Ajax warns that someone inside it could watch your event log, mute notifications and disarm the system (Ajax Systems). Two-factor authentication (2FA) is off by default. Once it's on, Ajax asks for a code from an authenticator app on top of your password. Its help describes no text-message codes or other second step (Ajax Systems). This guide uses Authenticator App - Novaz on iPhone, but any authenticator app works the same way.

How we checked this guide: the Ajax Systems steps come from Ajax's own support articles and the screenshots in them, linked below, which we read on October 20, 2026. We haven't tested them on an Ajax account, so a label may differ slightly. The Novaz steps are checked against the app, version 1.0.5.

Before you start

  • Update the Ajax app everywhere you use it. Ajax warns that an app version without 2FA support can't sign you in once it's on (Ajax Systems).
  • Expect to sign in again on other devices. Turning 2FA on signs your account out everywhere else, and each device then needs your password and a code.
  • Installers: Ajax PRO apps and PRO Desktop have the same setting, and PRO accounts are separate from user accounts (Ajax Systems), so turn it on in each. Employee accounts that sign in to Ajax PRO Desktop only with single sign-on (SSO) can't use it.

Turn on 2FA with an authenticator app

These steps follow Ajax's main security article and its screenshots (Ajax Systems):

  1. In the Ajax app, open the main menu with the icon in the upper-left corner and tap App Settings. Newer Ajax FAQs call it Account (Ajax Systems).
  2. Tap Account protection, then turn on the Two-Factor Authentication toggle.
  3. The first setup screen suggests a few authenticator apps. Any app will do, so tap Next.
  4. The screen Add this account to the authentication app shows a name (Ajax) and a text key, each with a copy button. The QR code is only behind Add account using QR code, offered for an authenticator on another device.
  5. Add the account to Novaz:
    • Novaz on the same iPhone as the Ajax app: tap the copy button next to the key. In Novaz, tap +, then Enter key manually. Type Ajax as the Service and paste the key into Setup key. Ajax's codes are 6 digits and last 30 seconds, which is what Novaz makes from a typed key. See What is a 2FA setup key?
    • Ajax open on another device, such as a tablet or computer: tap Add account using QR code there, then in Novaz tap + and Scan QR code.
  6. Back in Ajax, tap Next. On Enter the verification code, type the current code from Novaz and tap Verify.
  7. Ajax confirms that 2FA is enabled. Tap Close.

When Ajax asks for a code

Ajax asks for a code when you sign in, not when you open the app. A signed-in device stays signed in, so you'll need a code only on a new device, after signing out or changing your password, or after the session is ended remotely (Ajax Systems, Ajax Systems).

To sign in, tap Log in, enter your email and password, then the code from Novaz, and tap Verify (Ajax Systems). The prompt can come months apart, so keep Novaz on an iPhone you'll still have.

If Ajax rejects your code

Ajax's own advice is about the clock: if your phone's date and time are set by hand, the code from your authenticator will be treated as wrong (Ajax Systems). On iPhone, go to Settings > General > Date & Time and turn on Set Automatically. Novaz warns you when the clock is 15 seconds or more off.

If an older Ajax app won't sign in, update it. More causes are in Authenticator code not working?

If you lose your authenticator

Ajax's help mentions no backup or recovery codes, and its setup screenshots show none. Novaz keeps its keys on your iPhone, so without that iPhone or a Novaz backup (iCloud backup or a backup file), there's no self-service fix. Ajax says to contact Support if you can't get into your account or have trouble with its protection tools (Ajax Systems). Its support pages list support@ajax.systems, a Telegram bot and a regional phone number. Ajax doesn't say what proof Support asks for or how long a reset takes.

If the lost iPhone was signed in to the Ajax app, use another signed-in device: open Sessions (under App Settings or Account) and end that session, or tap Terminate all other sessions (Ajax Systems). Then change your password. More in Lost the phone with your authenticator app?

Changing phones or turning 2FA off

Ajax's help doesn't explain moving the authenticator to a new phone or turning 2FA off, but a Novaz iCloud backup or backup file lets you restore the account on the new iPhone with its codes still working (How to transfer your authenticator app to a new iPhone). Without one, keep the old iPhone for now: signing in on the new one takes a code from it. Ajax doesn't say whether switching the toggle off and on gives a new key, so ask Support before you wipe the old phone.

Official Ajax Systems help

More guides: Smart home and devices