Office 365 access from Power Shell

I am trying to connect office 365 using Windows Power Shell but every time i am getting "Access is denied " Exception , Same code was working 5 months since than I have not change code but i figure out that https://ps.outlook.com is not accessible over internet.

So Can some one confirm that https://ps.outlook.com  should be accessible over internet for communicating office 365 using Power Shell.

Thanks ,

Naveen Baghel

+91 9718787163