- The process engine configuration has an option to configure a whitelist (as an regex)
- The whitelist is used to verify whether the id of an user, group, or tenant (which should be created) matches against it
- if not, then an exception is thrown and the user (group or tenant) is not created
- by default the regex allows only alphanumeric values
- The change is documented in the upgrade guide 7.9 to 7.10
- When back porting the changes to 7.8 and 7.9 the current behavior should not break.