error 1326 logon failure: unknown user name or bad password

Hi All: I have a small 2008R2 domain with several DCs. The AD "administrator" account was not set up with "password never expires", so I have been resetting the password every 3 months.

I noticed recently that I'm getting group policy replication failures, and dcdiag is showing 

      Starting test: KnowsOfRoleHolders
         [SERVER1] DsBindWithSpnEx() failed with error 5,
         Access is denied..
         Warning: SERVER1is the Schema Owner, but is not responding to DS RPC
         Bind.
         [SERVER1] LDAP bind failed with error 1326,
         Logon failure: unknown user name or bad password..

Is this related to the password expiration on the "administrator" account? If not, what do I need to do to resolve the issue?