LICENSE_MAX_USERS
Values:0 to number of user licenses
Default:0
Multiple Instances:Must have the same values
Limits the maximum number of users to be created in the database. When this limit is reached, additional users cannot be created until the limit is increased. Concurrent usage (session) licensing and user licensing should not both be enabled; either LICENSE_MAX_SESSIONS or LICENSE_MAX_USERS, or both, should be set to 0. When running Oracle Parallel Server, the value for this parameter in the first instance to mount the database takes precedence where different instances contain different settings for this parameter.