The platform is up, but one dependency path is not.

Use this when discovery still points some clients at old controllers even though the directory was cleaned up correctly. These issues are easy to misread because the operating system still responds while one control path, runtime dependency, or trust assumption is already out of alignment.

The symptom usually appears downstream from the real change.

• DNS assumptions are often changed indirectly by updates, policy, hardware changes, or cleanup work that looked harmless at the time.
• SRV assumptions are often changed indirectly by updates, policy, hardware changes, or cleanup work that looked harmless at the time.
• AD DS assumptions are often changed indirectly by updates, policy, hardware changes, or cleanup work that looked harmless at the time.
• Windows assumptions are often changed indirectly by updates, policy, hardware changes, or cleanup work that looked harmless at the time.