Xpirit GitHub Enterprise on Azure as Managed Service Terms and conditions:
https://xpirit.com/wp-content/uploads/2021/11/General-Terms-and-Conditions-Xpirit-20201202.pdf
 
Bring Your Own License (BYOL): Customer must have legal rights to use third party technology used in the service. 

GitHub Enterprise Server Licensing Agreement: https://docs.github.com/en/free-pro-team@latest/github/site-policy/github-enterprise-server-license-agreement

Microsoft Customer Agreement: https://www.microsoft.com/licensing/docs/customeragreement