IBM i supports multiple system values that affect passwords for user profiles on a system. These system values, which begin with the characters QPWD, ideally must be set to the same values on each system that is part of an instance of a multi-system product like MIMIX or iTERA. Some products, such as iTERA, require they be set to the same values. Other products may strongly recommend the values be the same. If the values are more restrictive on the target system than on the source system, replication failures can occur for user profiles with replicated passwords. Installation processes for Precisely software do not automatically set these system values.
The QPWDLVL (password level) system value determines the level of password support on a system and requires an IPL to become effective. Changing the password level on the system requires careful consideration. If a system is configured for longer passwords and it communicates with other systems, then all the systems must be configured for longer passwords. Before you change this system value, you should be familiar with the information in Planning Password Level Changes in the Security section of the IBM i and System i Information Center at https://www.ibm.com/docs/en/i/7.1?topic=ssw_ibm_i_71/rzahg/icmain.html
Changes to other QPWD* system values take effect immediately.