<![CDATA[Constant LDAP/OCID errors in Outlook – Timeout or Server Issue?]]>Hi everyone,

I’m running a split Cloudron environment and experiencing constant password prompts in Outlook (IMAP), even though the credentials are correct.

Setup:

Server A: Cloudron Mail Server

Server B: Cloudron User Management (LDAP)

The Issue:
Outlook frequently pops up a login window. It seems like the Mail Server is failing to verify credentials with the LDAP Server in time.

Questions:

Could this be a timeout issue during the LDAP lookup between the two servers?

Has anyone else faced "credential looping" with Outlook in a multi-server Cloudron setup?

Which specific logs should I check on Server A to confirm an LDAP handshake delay?

Thanks for any help!

]]>https://forum.cloudron.io/topic/15301/constant-ldap-ocid-errors-in-outlook-timeout-or-server-issueRSS for NodeSat, 11 Jul 2026 02:18:21 GMTThu, 26 Mar 2026 09:05:14 GMT60<![CDATA[Reply to Constant LDAP/OCID errors in Outlook – Timeout or Server Issue? on Mon, 27 Apr 2026 09:23:43 GMT]]>Hi,
please check #5. We had split the LDAP Systems. So we cant get feedback on this.

Greetings,
Christian

]]>https://forum.cloudron.io/post/124044https://forum.cloudron.io/post/124044Mon, 27 Apr 2026 09:23:43 GMT<![CDATA[Reply to Constant LDAP/OCID errors in Outlook – Timeout or Server Issue? on Thu, 23 Apr 2026 07:17:22 GMT]]>Hello @orezbodajoy
This issue could be related to the Ubuntu kernel version 110 having a regression. If you are running kernel version 110 (check with uname -r).
See https://forum.cloudron.io/topic/15265/unusable-application/39

If you are running Kernel version 110 and you'd like to try, you could apply this patch manually https://git.cloudron.io/platform/box/-/commit/bffc97ab2fedb06100bc507abd0f8b42d343ea6e and then systemctl restart cloudron-firewall.

If this resolves the issue, please report back.

]]>https://forum.cloudron.io/post/123887https://forum.cloudron.io/post/123887Thu, 23 Apr 2026 07:17:22 GMT<![CDATA[Reply to Constant LDAP/OCID errors in Outlook – Timeout or Server Issue? on Fri, 03 Apr 2026 08:36:46 GMT]]>That is a good hint, so something is not working reliably with the ldap connection then. Can you check on Server A if you hit any rate-limits? You should see them with journalctl -k | grep CLOUDRON_RATELIMIT_LOG on Server A

]]>https://forum.cloudron.io/post/122874https://forum.cloudron.io/post/122874Fri, 03 Apr 2026 08:36:46 GMT<![CDATA[Reply to Constant LDAP/OCID errors in Outlook – Timeout or Server Issue? on Fri, 03 Apr 2026 07:18:12 GMT]]>So, update on this topic.

We change the Mailbox owner from LDAP Group (Server A) to local group (Server B - Mailserver).
Outlook and Auth problems stops immediately.

Greetings,
Chris

]]>https://forum.cloudron.io/post/122870https://forum.cloudron.io/post/122870Fri, 03 Apr 2026 07:18:12 GMT<![CDATA[Reply to Constant LDAP/OCID errors in Outlook – Timeout or Server Issue? on Tue, 31 Mar 2026 09:22:12 GMT]]>If the client (outlook) reconnects it would do the authentication again and then we have to validate those credentials at the source, so Server A in your case.

But if the mail server is restarting that is some other clue which might actually be the root cause. When that happens do you see anything in the mail service logs why it restarted? Maybe it ran out of memory or did it crash?

]]>https://forum.cloudron.io/post/122733https://forum.cloudron.io/post/122733Tue, 31 Mar 2026 09:22:12 GMT<![CDATA[Reply to Constant LDAP/OCID errors in Outlook – Timeout or Server Issue? on Mon, 30 Mar 2026 18:25:07 GMT]]>Hello,

Apologies for the late reply. Things have been rather busy.
The initial setup of the mailboxes is working. It seems, however, that timeouts or errors occur during regular mailbox checks (IMAP). Every now and then, you can see the mail service restarting.

Perhaps there are too many requests at once, or does the password check take too long (does Server B ‘Mailserver’ check with Server A on every retrieval to see if it’s authorised, or is that only processed on Server B?).

Best regards,
Christian

]]>https://forum.cloudron.io/post/122713https://forum.cloudron.io/post/122713Mon, 30 Mar 2026 18:25:07 GMT<![CDATA[Reply to Constant LDAP/OCID errors in Outlook – Timeout or Server Issue? on Thu, 26 Mar 2026 09:52:01 GMT]]>To narrow down the issue a bit, can you create a mailbox on Server A which uses a local account to authenticate and then setup Outlook for that mailbox? If this suffers the same issue, then it is not related to the LDAP binding between those two Cloudrons.

]]>https://forum.cloudron.io/post/122528https://forum.cloudron.io/post/122528Thu, 26 Mar 2026 09:52:01 GMT