> For the complete documentation index, see [llms.txt](https://docs.tiny.plus/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tiny.plus/guides/how-tos/enabling-two-factor-authentication.md).

# Enabling Two Factor Authentication

Add extra security to your tiny+ user account.

Two factor authentication (also known as 2FA) adds an extra layer of protection to your tiny+ user account. It's available to Account Admins, and we recommend it for every one of them.

With it on, tiny+ asks for a security code from your phone, as well as your password, each time you sign in. A browser you've chosen to stay signed in on isn't asked again until that sign-in lapses.

You need a mobile phone that can receive SMS messages and run the [Authy](https://authy.com/download/) app for iOS or Android.

## How to enable Two Factor Authentication

1. Sign in to [crm.tiny.plus](https://crm.tiny.plus/).
2. Click the settings cog at the top right and choose **My Settings**.
3. Under **Access and Security**, choose [**Two-Factor Authentication**](https://crm.tiny.plus/settings/2fa).
4. Confirm your country code and **Mobile Number**.
5. You receive an SMS with instructions to install the Authy app.
6. Install Authy, then type the seven-digit code it shows into tiny+. If the code doesn't arrive, choose **Get token by SMS** or **Get token by voice call**.

That's it. From then on, tiny+ asks for the current code from Authy when you sign in. Signing in with Microsoft through [Single Sign-On](/guides/advanced/single-sign-on-azure.md) doesn't ask, because Microsoft has already checked you.

## Changing your phone number

1. Open [**Two-Factor Authentication**](https://crm.tiny.plus/settings/2fa) under My Settings.
2. Turn the switch at the top off.
3. Follow the steps above with your new number.

## If you lose your phone

Your Account Admin can't reset two factor authentication for you. [Contact support](https://crm.tiny.plus/help) and we'll help you back in.

The [**Security**](/guides/how-tos/password-and-browsers.md) page beside it shows how many browsers are signed in as you, lets you sign the others out, and is where you change your password.