GitHub Enterprise Server 2.20

Invitations to join an organization or become a collaborator on a repository will expire seven days after they are created.

For more information, see the inviting collaborators to a personal repository and inviting users to join your organization documentation.

Find all the open issues in a repository that have closing pull requests references with the linked:pr search qualifier. Similarly, locate all the pull requests in a repository that are
missing a supporting issue with -linked:issue.

Try it on your personal issues list!