Forum Discussion
Metadata 'compulsory input'
Jason Hunt I think this is possible in classic experience by default if you use required columns. But, you cannot force users to provided metadata while uploading documents in modern experience.
In modern experience, if you use required columns, library files with incomplete/missing information will be shown in separate view called Files that need attention. Also files will show small message of Required info in column in library view (see in below image):
Check my answer given in this thread for more information: Page Library - new column with required field, how to prevent page creation if required field not filled
Please click Mark as Best Response & Like if my post helped you to solve your issue. This will help others to find the correct solution easily. It also closes the item. If the post was useful in other ways, please consider giving it Like.
Using drag and drop (for one or multiple files) will not show a dialog and the uploaded files will be checked out and not visible to other users.
Summary: implementing a solution where users have to enter required fields is not trivial