When running a FullSync in Identity Manager the system loads an object list (reduced sized) for Identity Manager and the target system as a first step. Next, the objects of both sides are matched based on the reduced properties list that are read from the first step.
The sync will handle every single object individually next. For example compare it with the properties that need to be updated, removed, etc. In this case as the system tries to update the objects, it proves that the objects were contained in the LIST read from the first step. However, during the single object handling the Jobserver is unable to find the objects.
The difference between list and object processing is in the AD search:
While reading the key terms and indexed properties of an AD object (for the LIST), every DC and GC are able to answer the search query. However a DC is needed to process a
a specific update. The error messages show that the DC is unable to process the updates of the object (Object processing). The DC processing this update is unknown to Identity Manager. This is due to the option "ServerBind" in the connection settings being inactive which means AD can forward every request to any available DC.