Cannot Logon – Username/Password Incorrect

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    Morning all,

    We have recently replaced our PDC for a 2012 R2 box.

    Our secondary DC is a 2008 R2 box.

    We are seeing issues randomly around the office whereby staff cannot logon to a 2008 R2 remote desktop server,

    It states that the username/password is incorrect, when infact, they aren’t.

    There doesn’t appear to be any issues with AD replication, I can see changes made to AD profiles on both servers within seconds of each other.

    What am I missing? Is there a security mismatch between the 2012 / 2008 boxes? KDC related?

    Many thanks,

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