LDAP Authentication Error w/ AD 2008R2

[tpfrankli]

Recently we have started getting this error on our call manager directly related to one domain controller. I was wondering if anyone has seen this error and if they were able to resolve it. The last time we saw this error the DC had to be rebuilt to make the call manager happy about binding to it. To further confuse this we can bind to AD using LDP.exe using the same credentials that the call manager is using. Also binding to a different DC works without a hitch.

Thanks in advance.

Call manager: 6.1.5.11900-13

Microsoft Active Directory 2008R2 Native Mode

Error while Connecting to ldap://uspdxdc10.internal.net:389/DC=internal,DC=net, javax.naming.NamingException: [LDAP: error code 1 - 000004DC: LdapErr: DSID-0C0906DC, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, v1db0]; remaining name \'DC=internal,DC=net\'

[Joseph Martini]

It might be a good idea to change to the global catalog (GC) port 3268 if the server is a GC to avoid referrals.