If you set up two-step verification but aren't being prompted to enter a code when you sign in to dropbox.com, it likely means you chose the Trust this computer option the last time you signed in. Trust this computer lets you access your account in a web browser without the additional security code.
To undo this, clear the cache and cookies in the web browser on your computer. The next time you sign in, you'll be prompted to enter a two-step verification code.
Two-step verification codes from the Dropbox desktop app
When you use the Dropbox desktop application to access dropbox.com, you'll notice we don't prompt you to enter a two-step verification code. This is because the computer has already been verified.
Adding two-step verification for web access from the desktop application wouldn't provide any additional protection for your files, because the files in your Dropbox account are already synced with the Dropbox folder on your computer. For this reason, we recommend you follow good security practices to protect your computer, including:
- Always lock your computer when you leave it unattended
- Require a password when it resumes from sleep, screen savers, and lock screens
- Only install the desktop application on trusted, non-public computers
If the explanations above don't apply to your situation and you're still not getting prompted for the two-step verification code, contact us.