This page walks through each step. Block off about five minutes the first time.

Step 1 — Open the login page

Either click the Login to DMU Portal button in your welcome email, or go directly to portal.dmu.gr.

Step 2 — You're redirected to secure.dmu.gr

You'll see the URL change to secure.dmu.gr. That's our identity provider — a separate sign-in page that handles authentication for the portal. The change of address is expected and the look-and-feel matches.

Step 3 — Enter your email

The first screen asks for your email address — the one your welcome email was sent to. Type it in and click Continue.

Step 4 — Verify the email

We email a 6-digit verification code to your address. It usually arrives within a few seconds.

• Switch tabs, grab the code from your inbox, and enter it on the next screen.
• If it doesn't arrive within a minute, check your spam folder, then hit the Resend button. A new code invalidates the previous one, so always use the most recent.

Entering the right code confirms you actually own the email address on file. This step happens once during onboarding; from then on, signing in is just password + your second factor. The code only comes back if you've forgotten your password and need to reset it.

Step 5 — Set a password

Right after verification, you're prompted to choose a password.

• The rules are shown on screen as you type (minimum length, mix of letters / digits / symbols, etc.). The strength indicator turns green when your choice satisfies every rule.
• A password manager is a good idea — every modern browser has one built in, plus standalone apps like 1Password or Bitwarden.

Confirm the password and click Submit. See Setting your password for the recovery flow if you ever forget it later.

Step 6 — Set up two-factor authentication

Finally, the system asks you to add a second factor — something beyond your password. This is required, not optional: it stops anyone who has your password from signing in without also having your phone or security key.

Pick one of:

• Authenticator app (TOTP) — a 6-digit code that rotates every 30 seconds, generated by an app on your phone (Google Authenticator, 1Password, Authy, Bitwarden, etc.). Most customers use this one.
• Email code — a one-time code sent to your registered email each time you sign in.
• SMS code — a one-time code sent by text message to your phone number.
• Security key — a physical USB or NFC key (YubiKey and similar) that you tap or insert at sign-in.

See MFA & security for the trade-offs and how to add a second method later.

Step 7 — You're in

You land back at portal.dmu.gr, signed in. From here you can:

• View your proposal and accept it — see Proposal acceptance.
• Pay your first invoice — see Payment.
• See everything else we share with you — services, project updates, the shared Drive.

Subsequent sign-ins

After the first time, signing in is just email → password → your second factor — on any device, no extra verification step. The 6-digit verification code only comes back if you reset a forgotten password.

Stuck on any step?

Call or write to us — the easiest way is to reply to your welcome email, or use the contact details on How to reach us. We can walk you through any of the steps on the phone.