Beta Managed Packages can only be installed in development environments which include Developer Edition, Sandbox and a special Professional Edition org.Partner Test Edition (Professional Edition).
Please refer below link on how to create and upload a beta release managed package.
Beta Managed Packages can only be installed in development environments which include Developer Edition, Sandbox and a special Professional Edition org.Partner Test Edition (Professional Edition).
Please refer below link on how to create and upload a beta release managed package.
https://developer.salesforce.com/docs/atlas.en-us.packagingGuide.meta/packagingGuide/packaging_upload_beta.htm
https://developer.salesforce.com/page/An_Introduction_to_Environments
Hope this helps you!
If this helps you please mark it as solved.
Thanks and Regards
Sandhya