Exchange attributes mapping

Hi everyone.

I see that following error appears in log files when creating a new Exchange mailbox:

Loading import file C:\Program Files (x86)\Quest Software\Quest One Identity Manager\Ex2010Component.dll.xml has changed the object property assignment rules and the member relationships. Property Mail not set. ([System.Runtime.InteropServices.COMException] The attribute syntax specified to the directory service is invalid. ) Property mailNickname not set. ([System.Runtime.InteropServices.COMException] The attribute syntax specified to the directory service is invalid. ) [1607003] Process task Update Mailbox failed. [921044] Error writing one or more properties of object. at StdioProcessor.StdioProcessor._Execute(Job job) at VI.JobService.JobComponents.Ex2010Component.Activate(String Task) ---- Start of Inner Exception ---- at VI.JobService.JobComponents.Ex2010Component.Activate(String Task) at VI.JobService.JobComponents.Ex2010Component._UPDATE_MAILBOX() at VI.JobService.JobComponents.NsJobComponent.MapPropertiesParamstoNS(PropertyMapping propMap)

However mailbox is created as it should be, but the process failed at step Update_Mailbox. I have checked mapping for Exchange attributes and everything seems OK. I have also checked XML file Ex2010Component.dll.xml and I can find following lines in it:

What else should I check?

Thanks,

Evgen