For the first login, see the instructions in the First Steps.
Any later login:
Step 1. Open the web browser and go to your login page. This is usually name_of_your_company.onesft.com. You can find your login page address in the second email from Onesft with the following email object: Your OneSoft Connect is ready for you.
Step 2. Enter your username: your email address
Step 3. Enter your password: the one you have chosen (if you forgot your password, see the instructions here)
