Hi @Naee m Raza
Welcome to our forum!
What type of personal account is yours? outlook.com? Or what subscription did you purchase?
Microsoft 365 Personal accounts do not support custom add-ins or sideloading via XML files.
Yes. Personal Microsoft accounts typically don’t support custom add-ins or sideloading via XML files. This feature is generally available for organizational accounts, such as those provided by a workplace or educational institution, which have the necessary administrative permissions and settings.
Here are the requirements and methods for you to build and deploy your add-in:
Build your first Outlook add-in.
Deploy and publish Office Add-ins.
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