Microsoft Excel keeps asking for my keychain
Microsoft Excel keeps asking for my keychain and I read in another post asking about the same question (https://support.apple.com/en-sg/HT201609), which said that I should "From the Edit menu in the menu bar, choose “Change Password for Keychain 'login.'” However, the change password for keychain option is not clickable. Is there anything else I can do to resolve this issue?
MacBook Pro 15", OS X 10.11