Hello @walid rifai , thank you for reaching out. If this application is registered in AAD, we can help you to figure out the redirect URIs configured for this app.
You can use the cloud shell present in the Azure Portal and run the following command to dump out the application details and the redirect URIs configured for it.
Get-AzureADApplication -SearchString <app-name> | select AppId, DisplayName, ReplyUrls
With this, you can figure out the Reply URls that you have already configured for your App Registrations in Azure AD and modify your requests accordingly.
Hope this helps.
Do let us know if this helps and if there are any more queries around this, please do let us know so that we can help you further. Also, please do not forget to accept the response as an Answer; if the above response helped in answering your query.