Not all users importing from Active Directory

Not all users importing from Active Directory

We have a scheduled import of Active Directory users at 11pm every night.
We have noticed that some new users (11) since 24th January are failing to import.
 
This is the error report from SDP. It is the same for all 11 users
 
We have deselected and reselected all AD OU's
We have refreshed the OU's
We have manully run the importer.
 
We are running  8.1.0 build 8122
 

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