Restricting access to outside vendors

Hi Team,

I would like to know about possibility of restricting access to outside vendors.

This vendor portal can be used to see the tasks which are assigned to vendors in bulk, and they should simply be able to update task completion status from this portal.

In our case customer doesn't want to give access of FSM 6 platform to vendors.

And don't allow them to access to IFS mobile too.

Can someone help us to understand the ways to implement above scenario.

Thanks,

Vamsi.