Have you seen this join-resolution errors during GalSync
Cause
A common cause of this error is that two or more users in the data source have identical smtp addresses in their list of email addresses as stored in the proxyAddresses attribute.
In the example shown in the Result section, note that the error displays two users - smtp dupe1 and smtp dupe2.
The error detail, "CS hol galsync" informs us that the offending objects are in the Connector Space (CS) of the "hol galsync" Management Agent.
In the example shown in the Result section, note that the error displays two users - smtp dupe1 and smtp dupe2.
The error detail, "CS hol galsync" informs us that the offending objects are in the Connector Space (CS) of the "hol galsync" Management Agent.
Resolution
To correct this error, ensure that duplicate addresses do not exist on the proxyAddresses attribute for objects that are being synchronized.
