When using collaboration services to synchronize calendars stub objects are not created on the target when a Display Name Mapper is used, the following error is received within the ACSalerts.log:
![2011/08/05 11:50:36.824] (2) Error :<Display Name Mapper> (1102) Collection <EXAMPLE> :
Attribute 'sn' not found in object(s):
This issue was due to the minimum number of attributes being selected to be synchronized within the publication properties.
To resolve this issue the attributes to be synchronized was increased to maximum in order to allow the creation of stub object.
Attached is also a list of attributes for user objects within a Windows 2008 and Exchange 2010 environment