You must have an active Odoo Enterprise license. You can manage this through the Odoo Customer Portal.
Most customers can download a compressed archive of the source code directly: install download odoo enterprise source code
Unable to access odoo source code on github with enterprise license You must have an active Odoo Enterprise license
Installing Odoo Enterprise from source code allows developers and administrators maximum control over their environment, enabling custom module development and precise server tuning. Because Odoo Enterprise is a proprietary product, accessing its source code requires a valid subscription and follows different procedures than the free Community edition. 1. Prerequisites for Odoo Enterprise install download odoo enterprise source code