I found two attributes in the account table : unmanaged and synchronized. What is the purpose of these two attributes? What do these fields stand for?
Password Authority 4.5.3
unmanaged=true is a privileged account. unmanaged=false is an A2A account. synchronized=true means update both the target system and Password Authority database
From the documentation on AddTargetAccount:
TargetAccount.privileged: Set TargetAccount.privileged=true to indicate that this account is a privileged account. Set TargetAccount.privileged=false to indicate that this account is an application-to-application account
TargetAccount.synchronize: Set TargetAccount.synchronize=true to indicate that the password stored in Password Authority should be synchronized with the password on the target system. This functionality is not supported with Target Application Type Generic. This functionality is not supported when TargetAccount.compoundAccount=true.