Hi, Marcus.
What `# rpm -qi gluu-server-3.1.2` does show outside of container? Please describe all steps allowing to reproduce your issues, as I can't observe it in my current CentOS 7.4 instance.
I don't seem to have the character case issue you are mentioning in my setup:
```
# grep -i -e 'encryptNameIds' /opt/shibboleth-idp/conf/relying-party.xml
p:encryptNameIDs="false"
p:encryptNameIDs="false"
p:encryptNameIDs="false"
p:encryptNameIDs="false"
p:encryptNameIDs="false"
p:encryptNameIDs="true"
```
If you are adamant to fix it in-place, to prevent your changes from being overwritten each time, you need to edit the corresponding Velocity template instead: `/opt/gluu/jetty/identity/conf/shibboleth3/idp/relying-party.xml.vm`