Sign in to Printix Client is automatic on Azure AD domain joined Windows 10 (version 1607 or later) computers. Works with Windows 10 editions: Pro, Enterprise and Education. Microsoft does not support Azure AD Join on the Windows 10 Home edition. However, if you have not accepted Printix for all users, users will be asked to accept this the first time they sign in.
RESOLUTION: Verify that Printix is Accepted for all users, so the automatic sign in to Printix Client works on Azure AD domain joined Windows 10 computers.