How can I make a List Form the default experience for List users who select Add New Item?

Dear @Linehan, Robert M,

Thank you for reaching out to the Microsoft Q&A Forum.

Correct me if I'm wrong, I understand that you're looking to make a List Form the default experience for List users who have direct access to the List and select "Add New Item." From my research, unfortunately, the functionality you are describing making a Form that was created separately from the main List a default experience for the built-in "Add new item" button is not directly supported within standard SharePoint List Settings.

If users are directly accessing the list without going through a Power App or a custom form, they might be bypassing your custom form. To ensure consistency, you can create links that take them directly to a form, or you might need to control access and permissions more tightly (e.g., only allow specific users to access the list directly and others through the custom form).

To ensure users get a specific experience when clicking the "Add new item" button, you must use one of the two Microsoft-supported methods, which replace the default form:

1: Customize with Power Apps 

This is the standard, most flexible method and is supported directly within the List interface:

• While viewing your List, select Integrate.
• Choose Power Apps and then Customize Forms.
• This opens the Power Apps studio, where you can modify the form's appearance, fields, and logic.
• Once customized and published, the Power App form automatically replaces the default "Add new item" experience for all users accessing the List.

For reference: Customize a form for a SharePoint list | Microsoft Learn

2.Using Microsoft Lists

If you’re using the modern Microsoft Lists experience and have a custom form that’s not a Power Apps form, there’s no direct setting under List Settings > Form Settings to set it as the default for "Add New Item". The default behavior is that SharePoint will use either the default list form or any form created via Power Apps. However, if users are accessing via a custom URL or link that directly points to the form, they will use the custom form.

In such cases, you can:

• Stop providing direct List access to the users and instead share the direct link to the Microsoft Form with them.
• Use Power Automate to trigger custom actions on item creation if you need more advanced logic.

I understand the necessity of this feature for your workflow and how it would certainly save time and enhance efficiency. If this is a feature you would like to see, I suggest keeping an eye on the Microsoft SharePoint blog or the Microsoft 365 Roadmap | Microsoft 365 for any updates on this feature. In the meantime, I apologize for the inconvenience this may cause. I also strongly recommend that you share your detailed experience and feedback directly with the Microsoft product team through their official channels. This is the most effective way to make your voice heard and influence future feature improvements and adjustments. 
You can visit the SharePoint · Community to submit a new idea or vote on existing one. Our product team is in charge of this site, and they constantly check customer reviews and feedback. The higher the number of votes, the more attention the team will pay to it. Many features are developed and improved based on customer feedback. As a moderator, I will also pass along your feedback to the appropriate team for further consideration. While we don't directly influence product design, user feedback is actively reviewed and helps prioritize future development. 

We appreciate your kindness and understanding as we deal with these evolutionary product changes. I hope this information helps clarify the situation and provides you with workable solutions. Should you have any further questions or need additional assistance, please don't hesitate to reach out. We're always here to help. Have a wonderful day! 

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