How can we constraint user to fill Daily Microsoft forms upto 1AM to 10PM only?

Ghanshyam_Savaliya you can't do this with Microsoft Forms as a) there is no way to have a daily 1am to 10pm window for the form to be completed in, and b) there is no functionality to only permit a date in the future (a uservoice request for that is https://microsoftforms.uservoice.com/forums/386451-welcome-to-microsoft-forms-suggestion-box/suggestions/40890958-prevent-selection-of-dates-in-the-past-in-the-dat).

Additionally there is nothing that will help you here with Power Automate as it can only work on the submitted form. I suppose if you were saving the results in a SharePoint list you could send an email back to the user if they submitted the form outside the window or entered a past date and ask them to re-submit the form and not save it to the list. But that's a bit of a clunky workaround.

To achieve what you want would need a Power Apps form but that will only work if all the users are in your organisation.

Rob
Los Gallardos
Microsoft Power Automate Community Super User