AD Takeover, Or as AD Backup DC Errors

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#1

Hi Guys,

Current Setup windows server 2016 / Forest and Domain level windows 2008

Domain name: syncdc.network
Server pdc

i have previously installed ucs server as a backup dc, for some reason or another i deleted it, and now when i try to add ucs as a backup dc i get the error
“the connection to ucs dc master was refused,please recheck password”.

i have removed the previous dns record from windows dc, but still i get the error. i can connect windows pcs to windows dc no issues with admin pass.

Please help