Column dstdn is not uniq | 1
This indicates that an ADD attempted to sync to destination DN that is associated with a previously synced source object.
RESOLUTION 1
Check the DN mapping in use (i.e. ~mail~ ~cn~). Confirm the cn= value applied and search the ldif.txt file for the matching value to find the other source object with the identical value. In order for both of these objects to sync, one of their values must be changed.
Delete \Connections\YourConnectionName\*.db and this may resolve the issue.
RESOLUTION 2
1- Go to Advanced Settings | Custom Configurations and Filters of the connector.
2- Select Add
3- Add the following values:
4- Save and activate the connector
searchmodebase will tell the connector where the destination DN search should start searching in the target AD.