You can connect your GitHub.com and GitHub Enterprise accounts to search for content in certain private GitHub.com repositories from GitHub Enterprise.
If you use GitHub Enterprise and GitHub.com and your GitHub Enterprise site administrator has enabled GitHub Connect and Unified Search for private repositories, then you can search for designated private repositories in the connected organization.
To see private repositories in your search results, you must already have access to these repositories and connect your GitHub Enterprise and GitHub.com accounts. For more information about the repositories you can search in, see "Searching across GitHub Enterprise and GitHub.com simultaneously."
Sign in to your GitHub Enterprise instance and GitHub.com.
On your GitHub Enterprise instance, in the upper-right corner of any page, click your profile photo, then click Settings.
In the left sidebar, click GitHub Connect.
Click Connect to GitHub.com.
Review the resources that GitHub Enterprise will access from your GitHub.com account, then click Authorize.