Add Password in IE using GPO

Hello there

We're using a service hosted by another company via https.

I'd like to send to users the credentials to access this website via GPO, like if they set it and use "remember password" (the credentials are remembered in the client, and we only have to click in a field to autocomplete fields).

This is to not allow to clients to know the interface credentials, and to not to be able to access the service out of our company place - their home for example-.

Is it possible to do this ?

Thanks in advance

Nicolas