You put U-M systems and data at risk if you use your UMICH (Level-1) password for non-university services. If you use your UMICH email address and password to establish a personal account (for example, at LinkedIn), and that information is exposed in a data breach, your UMICH account is now at risk.
If you have used your UMICH password for non-university services, please change your UMICH password, and choose a different password for each of your non-UMICH accounts. Change your password at UMICH Account Management.