How to connect a customer to my EA



i have few customer that i want to connect to my EA, i dont want to send them the ex5 file

i run a vps with my   EA  for each customer and ask from them the password and  account number and then connect them to my EA , there is a customer that dont want to send the  password 

can i connect them to my EA without to ask them the password to their account ? maybe just to send me the account number ? or ask them to change somthing in their properties ?

the EA is not make trade , just make a traling stop to the customer, soo i need to know which position is open and get access to change them