How to Send an Account's Email Login/Password from Accounts Page
Click Org Tools > Accounts from the left navigation menu.
Select the Account(s) you would like to send login information to.
Click Communicate > Email Login.
Click Send to confirm you'd like to send the login instructions to the selected accounts.
How to Send an Account's Email Login from an Individual Account
Click Org Tools > Accounts from the left navigation menu.
Click on the "Last Name" of the desired account.
On the right-hand side of the popup screen, click Email Login Instructions or Email Password Reset > Click Again to Confirm.
After confirming, you will see a green Instructions Sent.