I just upgraded two of my TrueNAS servers from 24.10.2 to 25.04.0. One of my servers, I ended up reinstalling from scratch due to a previous boot partition issue. The issue I’m having now is, the one server that was installed from scratch is having a terrible time with Active Directory. Whereas, th…

I have the same issue. I can mess around with deleting the Kerberos Keytab and rejoining the AD, but then it faults again after a day or two.

Yeah, it’s weird. I never had any issues with <= 24.10.2. I’ve reinstalled the problematic Scale server and if/when it loses connection to AD (i.e., Reboot AD server), it will eventually fault. I have to (re)enable, then leave Domain and join again for it to stay. It’s a pain since this server hosts…

It looks to be a pretty widespread issue. So far, after leaving, and rejoining my domain (several times) I haven’t seen the error. If I do, I’ll make sure to add my data to that ticket. Thanks for sharing!

Active Directory on Fangtooth Issue

TrueNAS General

GlendonKuhns May 30, 2025, 12:37pm 4

I found a different discussion related to this problem. [KRB5KDC_ERR_PREAUTH_FAILED] Errors on AD quite often

Topic		Replies	Views
Can't Add Active Directory 25.10 TrueNAS General SCALE	4	444	November 4, 2025
Active Directory join fails with [ENOENT] KEYRING:persistent:0: Credentials cache does not exist TrueNAS General	6	788	August 13, 2025
Active Directory Join Fails in 25.10.0.1 TrueNAS General	1	124	November 29, 2025
AD join suddenly faulted TrueNAS General SCALE	1	549	May 5, 2025
AD Faults with "conf.bindpw: Parameter is required" after some days TrueNAS General SCALE , AD	4	459	February 25, 2026

Active Directory on Fangtooth Issue

Related topics