IBM Tivoli Access Manager (TAM) is an authentication and authorization solution for corporate web services, operating systems, and existing applications. Tivoli Access Manager runs on various operating system platforms such as Unix (AIX, Solaris, HP-UX), Linux, and Windows.It has been renamed as IBM Security Access Manager (ISAM), in line with the renaming of other Tivoli products, such as TIM turned ISIM.