In compatibility mode, two instances of inetDomainStatus exist, one in the DC Tree and one in the Organization Tree.
A 5.x server would reference inetDomainStatus in the DC Tree. A version 6 server would reference inetDomainStatus in the Organization Tree.
Access Manager-based provisioning tools such as the Delegated Administrator console and command-line utility (commadmin) ensure that the two copies of inetDomainStatus maintain the same value (active or inactive).
Your own provisioning tools (if you use any) also must ensure that the two copies of inetDomainStatus are set to the same value.