Login to the Portal using the MTan method

For your info: You find the pictures to the clarification of the text in the tile in the right image border! 

Description: The MTan method should be used to make a login to the Viessmann Portal without using a smartcard. To make use of this function a registration has to be carried out in the Portal.

Step by Step Instructions:

1. Registration in the Portal  

Within Requests -> IT Authorization

In the application „MTan-Administration“

The following information has to be provided:

    • Password

    • Mobile Number (this mobile number is not visible to others)

2.  MTan Request and Login

2.1. Open the Site

https://www.viessmann.com/mtan/login (bookmark this site in your browser)

2.2. „MTan Request “

Enter your shortcode and the password you chose at registration. An MTan will be sent to the registered Mobile Number.

2.3. „MTan Login “

Enter your shortcode and the MTan that was received, so that you are automatically logged into the Viessmann Portal.

2.4. „Login with Link“

If you are using a mobile device like Blackberry or other smartphones, please click on the link in your SMS. Your browser will open the site, which is shown in picture 4. Here enter your password and click on "Logon".

Notice: Due to security reasons the validity of the MTan has been reduced to 3 hours. After this period a new MTan has to be requested.