secLDAP plugin failed to get name for the entry XIR2 SP2

When a user who is in the ldap store attempts to log into InfoView, after about 10 minutes, he gets a message as follows:

Account Information Not Recognized: An error occurred at the server: the secLdap plugin failed to get the name for the entry with dn=cn= with what appears to be appropriate information. This user does not appear to have a presence in BO (does not have an inbox, favorites, etc) nor does he appear in the ldap userlist in the CMC.

Can you describe the functionality contained in this plugin ? It's function ?

Thank you,

Vicki Stanfield