This condition may be caused by a DNS lookup problem.
For information about troubleshooting common DNS lookup problems, please see the following Microsoft Web site:
The following are some of the most common errors that relate to join issues: The join process usually tries to find a domain controller that already has a computer account for the computer that is currently being joined to the domain.
If such a domain controller is not found, it tries to find another domain controller.
Even though these problems are reported as join problems, some of the most frequently reported ones are not related to the join process.
Looking at the is sufficient to quickly spot such cases.
I'm in the process of getting my MCITP in Windows server administration, so bear with me. The prompt just re-appears after entering my correct creds and I get the following in the logs: Jan 31 server.marathon: [2017-01-31 ,202] ERROR LDAP Naming Exception during authentication: [LDAP: error code 49 - 80090308: Ldap Err: DSID-0C0903D9, comment: Accept Security Context error, data 52e, v2580 Jan 31 server.marathon: [2017-01-31 ,202] ERROR LDAP error validating user: (io.containx.marathon.LDAPAuthenticator:pool-3-thread-1) Jan 31 server.marathon: com.google.common.cache. Cache Loader$Invalid Cache Load Exception: Cache Loader returned null for key Auth Key.Hi all, I see there is someone getting a similar error to me above, but the latest fix does not seem to apply to me.I'm not super LDAP experienced and I am having a hell of a time configuring this to work with my Windows Server 2012 Active Directory. Get-ADUser -Filter Distinguished Name : CN=Matt Richter, CN=Users, DC=domain, DC=com Enabled : True Given Name : Matt Name : Matt Richter Object Class : user Object GUID : 65b42d5e-f330-4a3b-9bb9-976536affdb3 Sam Account Name : MRichter SID : S-1-5-21-4183530585-134636266-2064867791-2498 Surname : Richter User Principal Name : [email protected] -Search Base "OU=Security Groups, DC=domain, DC=com" -filter Distinguished Name : CN=Infrastructure Group, OU=Security Groups, DC=domain, DC=com Group Category : Security Group Scope : Global Name : Infrastructure Group Object Class : group Object GUID : 2e13cf87-1282-459b-957f-9062f6b7f2ad Sam Account Name : Infrastructure Group SID : S-1-5-21-4183530585-134636266-2064867791-13614 I deploy and restart marathon, then log into the UI via chrome, and I get prompted for my username/password.