Your ITWConnect.com username and password control all aspects of the Office 365 suite. This includes Skype for Business, Teams, Outlook, Excel, Word, Access, PowerPoint, SharePoint, PowerBI, etc..
Please go to https://my.itwconnect.com to manage this password.
If you do not know your password and you are unable to reset the password via https://my.itwconnect.com then you will need to call (224) 661-7123 for assistance