Symptoms:
Root Cause: This issue is caused by a version mismatch between the Infrastructure Manager client and the DX UIM environment. Starting with DX UIM 20.4, security enhancements were introduced that use encrypted internal callbacks. Older versions of IM are unable to process these encrypted requests, resulting in a failure to save security configuration changes to the security.cfg file.
Resolution: Upgrade the Infrastructure Manager (IM) client to match the version of your DX UIM environment:
http://<primary_hub_ip_or_hostname>/uimhome.NimBUS Manager.exe). Note: This page always contains the correct version for your specific DX UIM environment.