When trying to demote a domain controller which had been powered off for several months, I ran into this error:
Also, the new domain controller that I'd just spun up couldn't access the NETLOGON share.
DCDIAG had this warning:
The DFS replication event log had this warning, with instructions that don't work:
Thankfully, this blog post explained what to do (all on one line):
wmic.exe /namespace:\\root\microsoftdfs path DfsrMachineConfig set MaxOfflineTimeInDays=200