User presence App always shows Offline

[Arun7even]

I've recently created a c# application using UCWA Web Sdk which updates the user's presence from Microsoft teams. I created a azure AAD Native application configured with Skype for business Online API with required admin consents and used its App ID in the c# application. I got the user's presence correctly. But recently(exactly from Nov-1), I am not able to get my user's presence as it shows Offline all the time. I have no issues with the code. Do i need to modify any changes in my AAD Application?.