WHMCS can automatically provision services, you can specify whether this happens before or after payment, wait until manually approved by a member of staff, or disabled entirely.

This is set on a per-product basis, navigate to Setup > Products/Services > Products/Services > Edit > Module Settings tab and the four auto-setup options will be available for you to select:

If the auto-setup is not occurring please begin your troubleshooting by watching this video tutorial.

If that doesn't help please review Utilities > Activity Log at the time of ordering for any error messages which should explain what the problem is. An explanation of common error messages can be found at:

• Common Troubleshooting Tips
• Server Modules