Custom Outlook Mailbox Panel

I need a web panel on my own domain that replicates the workflow shown at https://dongvanfb.net/read_mail_box/, but it will connect exclusively to Outlook mailboxes. The core flow—sign-in, token handling,... (Budget: ₹600 - ₹1500 INR, Jobs: .NET, API Development, Backend Development, C# Programming, PHP, Security, Software Architecture, Web Development)