Skype for business is a wonderful tool for your business communication. This is really annoying, when you are unable to sign in to your Skype account. Well, you can fix this issue easily, using these quick tips. Update your computer’s date and time Re-enter your password, if you have changed it recently Reset your password, if you find an incorrect password error Check your sign-in address, this needs to be a complete address Check if your password works with Office 365, your account should work properly You can call Skype customer support toll-free number for instant help.