ldap_sasl_interactive_bind_s: Invalid credentials

["Pantejo Barbara-XJC864" <XJC864@motorola.com>]

I have a NIS server that authenticates its users against a central LDAP
server. To verify that it uses DIGEST-MD5 authentication, I ran the
following command:

[snip]
$ ldapsearch -Y DIGEST-MD5 -h ids.mot.com -b
ou=people,ou=intranet,dc=motorola,dc=com -D
motguid=XJC864,ou=people,ou=intranet,dc=motorola,dc=com -W -v
motguid=XJC864 ldap_init( ids.mot.com, 0 ) Enter LDAP Password:
SASL/DIGEST-MD5 authentication started
ldap_sasl_interactive_bind_s: Invalid credentials
        additional info: SASL(-1): generic failure: unable canonify user
and get auxprops $ [snap]

As you can see, it starts MD5 authentication but get this error (even
though I enter the correct password).  Has anyone encountered and fixed
such an error? Does anyone know how to troubleshoot this error? Any
assistance would be appreciated.

Thank you,
BJP