The limitation to maximum 8 digits for the password lenght is valid only for some old eHealth versions - 6.2.x, 6.3.0.xx, 6.3.1.xx, and few 6.3.2.xx maint kits.
Starting from eHealth 18.104.22.168 we support a maximum of 32 characters for the eHealth users' password.
When creating a new User or changing the password for an existing User in OneClick for eHealth console, you will see the note saying:
"A maximum of 32 characters is allowed"
and the password field will show all the 32 digits (masked) that are entered.
You can set the password of your choice and then use it for the users’ log in to OneClick and the web UI.