When a BIM 360 subscription is created, the account administrator can activate the account via an email invitation.
If you are the first account administrator, you'll receive a welcome email from Autodesk containing a link to activate your account. This activation email is the first touch point between you and the product.
To activate your account:
Open the Welcome to Autodesk BIM 360 email.
Click Activate your account.
Sign in to BIM 360:
If you already have an Autodesk ID, you can use this to sign in.
If you don't have an Autodesk ID yet, click Create Account and enter the required information.
At this point, your account is activated! You can now access BIM 360 directly from: https://admin.b360.autodesk.com/login (US data center) or https://admin.b360.eu.autodesk.com/login (Europe data center) and begin to configure your account from the Account Admin module (Module Selector Account Admin).