Introducing new Nextcloud Zimlet for Classic UI

We have backported the Modern UI Nextcloud Zimlet that uses OAuth to the Classic UI. A number of partners have requested this Classic UI Zimlet since there are still many users the like to work with the Classic UI.

With the Nextcloud Zimlet you will be able to save emails and attachments from Zimbra to Nextcloud. And of course you can attach files from Nextcloud to email as a file or as a shared link.

To install the Classic UI Zimlet, just run

apt install zimbra-zimlet-nextcloud
yum install zimbra-zimlet-nextcloud

Then as the user `zimbra` restart Zimbra mailbox:

zmmailboxdctl restart

Then both the Classic and Modern UI version of the Nextcloud Zimlet will be installed.


Saving an attachment to Nextcloud

Attach from Nextcloud

Save email to Nextcloud

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5 Responses to Introducing new Nextcloud Zimlet for Classic UI

  1. alex August 17, 2023 at 9:00 AM #

    will it work with 8.8.15?

    • Avatar photo
      Barry de Graaff August 21, 2023 at 3:35 AM #

      No as there is no OAuth support for 8.8.15.

  2. Renaud January 20, 2024 at 11:16 AM #


    When I try to activate nextcloud for a user, I authenticate correctly to nextcloud but when I clic on allow access i’m back to mailbox and have following error in mailbox.log :

    hostname of zimbra replaced by and nextcloud :

    ERROR [qtp1147258851-5472: [name=m.*****@***.fr;] extensions – There was an issue acquiring the authorization token. :

    here are my ldap OAuth value

    zimbraOAuthConsumerCredentials: Xw5s2tJypGuMrkySvv0AdOWM5zl0kNQYZ52CgMkhlmlT4Gx8c:MTrX1DVHHpZGZYWf35BDlXpnRRW5CxBnN2miBNhuK2d5zRj4Y4wDjJx:nextcloud

    Nextcloud : 27.1.5
    zimbra : version 9.0.0_GA_4583

    Thanks for your help…

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      Barry de Graaff January 21, 2024 at 11:28 PM #

      Are you using an alias to log-in? If so try the zimbra account and not an alias.

      Check the specifically:

      zimbraOAuthConsumerAPIScope holds the URL to your Nextcloud instance, in our example we have set-up Nextcloud in a folder /nextcloud on If your Nextcloud is installed directly in the root / of your domain, make sure to use as zimbraOAuthConsumerAPIScope.

      In case your Zimbra and Nextcloud are on different domains, for e.g. and, in that case you have to disable the same site cookie restriction. Execute the following commands:

      zmlocalconfig -e zimbra_same_site_cookie=""
      zmmailboxdctl restart

      Beware for cache, see admin guide. Please upgrade to Zimbra 10 as Zimbra 9 is EOL soon.

  3. Angelique Osterholzer January 30, 2024 at 3:55 AM #


    Thank you for sharing the update on the new Nextcloud Zimlet for Classic UI. It’s great to see the effort to accommodate users who prefer working with the Classic UI. Personally, I’ve found to be a reliable and secure cloud provider, and I highly recommend it. Your insights are appreciated!

    Best regards

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