We can enable a courier provider by following way:
1. The list of shipping providers on the path Settings -> Shipping providers. The defined serviceability and available AWB count is highlighted on this page.
2. Multiple accounts of a shipping provider can be seen in different rows in the list.
3. A Shipping Provider which is disabled can be enabled by clicking show disabled providers.
and then select your shipping provider from the given list of integrated courier partners.
4. The next page asks for account enable button make it “ON”
Now you can configured the rest details as per your shipping provider setting earlier.
Video help to learn about how to enable a shipping provider in the system: