DFSR Migration was unable to delete the NTFRS local settings on Domain Controller %1!S!. This could be because DFSR was unable ...

DFSR Migration was unable to delete the NTFRS local settings on Domain Controller %1!S!. This could be because DFSR was unable to connect to the Domain Controller %2!S!. If the Domain Controller %1!S! is a Read-only Domain Controller, the NTFRS local settings will be deleted by the Primary Domain Controller the next time DFSR polls the Active Directory. 
 
To forcefully delete these settings, execute the command 'dfsrmig /DeleteRoNtfrsMember' on any writable Domain Controller. 
 
Additional Information: 
Local Domain Controller: %1!S! 
Connected Domain Controller: %2!S! 
Error: %3!S! (%4!S!)