You can access the EHRI resources here:

EHRI Portal gives online access to dispersed Holocaust sources

EHRI Online Course in Holocaust Studies

Interactive EHRI Online Course in Holocaust Studies

EHRI Research Guides on Terezín and "Jewish councils"

EHRI Document Blog

International Research Portal (IRP2) for Records Related to Nazi-era Cultural Property Since June 2017, EHRI also hosts IRP2.

EHRI for Institutions if you work for an institution that holds Holocaust-related archival materials, in Europe or beyond, you can become part of the EHRI Portal.

Please, also click on these links for more information. 

Or for the EHRI Portal, wacht this video that gives a short introduction. You can also find it in the Portal Manual.