Short answer: There is no official product or feature called “Seige” or “Trusted Device Seige.” The most likely case is that you meant:

  • “Siege” (a video game), or
  • a trusted device for a platform like Microsoft, Google, or Apple, and you misheard/misspelled the name.

Below is what you can actually do, plus how to handle each likely meaning.

1. If you meant “trusted device” for a common account (Microsoft, Google,

Apple)

“Trusted device” is a standard security feature, not game-specific. Here’s how it works in practice.

Microsoft account

To register a trusted device for your Microsoft account:

  1. On the device you want to trust, go to the Security settings page for your Microsoft account and sign in.
  2. Verify your identity (email, SMS, or authenticator app).
  3. When prompted, check “Don’t ask me again on this device” (or “Neptat se mě už na tomto zařízení” / “Don’t ask again on this device” depending on language).
  4. Choose Verify.

After that, the device is trusted and you won’t be asked for a security code again for normal sign-ins on that device.

Google account

To add a trusted device for your Google account:

  1. On the device, sign in to your Google account.
  2. Go to Account → Security (or “Google Account → Security”).
  3. Make sure 2‑step verification is enabled.
  4. Under Your devices , find the current device and choose Keep signed in or Mark as trusted if available.
  5. Complete the verification prompt (SMS code, notification on your primary phone, or backup code).

The device will then appear under trusted devices and reduce repeated 2‑step prompts.

Apple (Apple Account)

To add or remove trusted devices on Mac:

  1. On your Mac, open System Settings (or System Preferences on older macOS).
  2. Click Sign in (or your name / iCloud) and log in with your Apple Account.
  3. Your Mac, iPhone, iPad, or Apple Watch that is already signed in with two‑factor authentication becomes a trusted device.
  4. To manage them: go to System Settings → Your name → Trusted devices , then:
    • Click a device to see details.
    • Click Remove from Account to stop trusting it.

2. If you meant the game “Rainbow Six Siege”

There is no official “trusted device” feature for Tom Clancy’s Rainbow Six Siege (often shortened to “Siege”).

What gamers sometimes call “trusted device” in this context is usually:

  • Logging into Ubisoft Connect on a PC/console and using 2‑factor authentication.
  • Using a hardware key or authorized app for login.
  • Avoiding third‑party “login boosters” or untrusted hardware.

If you want to secure your Ubisoft/Siege account:

  1. Go to your Ubisoft account security page.
  2. Enable 2‑factor authentication.
  3. Use a trusted phone number or authenticator app.
  4. Only sign in on devices you personally control.

There is no special “register trusted device Siege” menu in the game itself.

3. If “Seige” is some other product or local service

If “Seige” is:

  • A local tutoring app, trading platform, or custom service,
  • A company/internal tool,
  • Or a regional product name,

then the exact steps will depend on that product. In that case, you likely need:

  • The official app or website for Seige (spell it exactly as shown in their docs).
  • Their Help / Support or Security section.
  • Steps like:
    • Log in on the device.
    • Go to Settings → Security → Trusted Devices.
    • Tap Add / Register trusted device.
    • Confirm via SMS/email/app.

If you can tell me:

  • What “Seige” is (game, app, website, company tool?),
  • And what you’re trying to log in to (e.g., a game account, a bank, a school portal),

I can give you exact, step‑by‑step instructions that match that product. Information gathered from public forums or data available on the internet and portrayed here.