Disable password reset function on the employee portal or a way to share all incidents with a large group of users

[Brhow]

Hello, 

I have been trying to find a way to allow all our users in a group to be able to view and respond to incidents on behalf of each other. 

Could anyone suggest how this can be achieved?

Barring that I have to let them log in as a single user to see requests in a certain service and they keep changing the password and then locking the account with incorrect password guesses 

Thanks

Brett