We will stop the federate sign in using Office 365 account.
Office 365 icon in the sign in page will be removed after May 30th, 2019.
Please refer to the attached image also.
After the termination, you need to reset your password by "Forgot Password?" link in the sign in page to login to SkyDesk.
Please input your Office 365 Email address as a SkyDesk signin Email address.
You have to mange your password in SkyDesk after the reset.
Thank you for your understanding.