Comparison report shows Custom for the delegation security setting
In the GPO comparison reports the delegation security setting for an account is showing as Custom in both the backup and in AD.
The GPO Comparison report only reads and displays what is shown on the Delegation tab of the GPO. When a custom security setting is set, the Delegation tab will only show Custom. The comparison report is not capable of drilling down into the Advanced security settings to see what the Custom settings are.