This user is the os administrator used to perform administrative tasks on the SAP system. Especially such tasks as upgrade and transport imports are carried out under this user. Misconfiguration can lead to errors in these tasks.
Password: set by the user during the installation.
Server roles: sysadmin
Database roles: n/a
Tags: What is sidadm User in SAP, SAP sidadm, <sid>adm, sidadm permissions,