[GH-ISSUE #238] LDAP Error when CalDav Synchronizer is running. #700

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opened 2026-03-01 17:41:01 +03:00 by kerem · 2 comments

kerem commented

2026-03-01 17:41:01 +03:00

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Originally created by @monsieurhannes on GitHub (Sep 3, 2018).
Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/238

Hi,

I have problems using Outlook any longer when CalDav Synchronizer is active. What happens is that as soon as the Plugin wants to synchronize I get a popup and Outlook hangs itself up.
In the Pop-Up it says that Outlook is not able to reach the LDAP Server. As far as I get my environment we don't use a LDAP server, we just have Nextcloud as Groupware and connect to it via CalDav.

When I disable the plugin everyhing is fine.

The things I did before: Updated Nextcloud to 13.0.6 (but I believe it worked after that) and I wrote an email to a person that is not in the addressbook. As far as I heard the problem is only on my computer. It happens when the synchronization with the calendar / contacts starts.

Any idea what happened?

Outlook 2016 MSO 32Bit Version 1807
CalDav Synchronizer 3.2

Tell me if you need more information. Thank you!

Originally created by @monsieurhannes on GitHub (Sep 3, 2018). Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/238 Hi, I have problems using Outlook any longer when CalDav Synchronizer is active. What happens is that as soon as the Plugin wants to synchronize I get a popup and Outlook hangs itself up. In the Pop-Up it says that Outlook is not able to reach the LDAP Server. As far as I get my environment we don't use a LDAP server, we just have Nextcloud as Groupware and connect to it via CalDav. When I disable the plugin everyhing is fine. The things I did before: Updated Nextcloud to 13.0.6 (but I believe it worked after that) and I wrote an email to a person that is not in the addressbook. As far as I heard the problem is only on my computer. It happens when the synchronization with the calendar / contacts starts. Any idea what happened? ![error_ldap_eng](https://user-images.githubusercontent.com/20651440/44994606-a5bba880-af9f-11e8-9191-15b9699f0bf4.PNG) **Outlook 2016 MSO 32Bit Version 1807 CalDav Synchronizer 3.2** Tell me if you need more information. Thank you!

kerem closed this issue

2026-03-01 17:41:01 +03:00

kerem commented

2026-03-01 17:41:02 +03:00

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@aluxnimm commented on GitHub (Sep 3, 2018):

Somehow Outlook tries to connect to a LDAP server and doesn't reach it? It isn't used directly by our add-in but indirectly when trying to resolve address books or recipients. Maybe you misconfigured your addressbook settings or the auto resolve feature. Try to remove any existing LDAP settings, see
https://answers.microsoft.com/en-us/office/forum/office_2010-outlook/address-book-error-81/bfaa24eb-1779-4b91-92e4-13a3e45ee4d4
for example.

@aluxnimm commented on GitHub (Sep 3, 2018): Somehow Outlook tries to connect to a LDAP server and doesn't reach it? It isn't used directly by our add-in but indirectly when trying to resolve address books or recipients. Maybe you misconfigured your addressbook settings or the auto resolve feature. Try to remove any existing LDAP settings, see https://answers.microsoft.com/en-us/office/forum/office_2010-outlook/address-book-error-81/bfaa24eb-1779-4b91-92e4-13a3e45ee4d4 for example.

kerem commented

2026-03-01 17:41:02 +03:00

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@monsieurhannes commented on GitHub (Sep 4, 2018):

Worked, thank you. No idea how the LDAP-Addressbook got created and why it started to make problems only now. Back to work :)

@monsieurhannes commented on GitHub (Sep 4, 2018): Worked, thank you. No idea how the LDAP-Addressbook got created and why it started to make problems only now. Back to work :)