mail client integration Nextcloud has integration with a number of mail clients which (automatically or manually) uploads attachments to Nextcloud and inserts a link in the email.
talk (spreedme) It seems Spreed.ME deserves its own section! In this category you can ask questions and discuss integration in Nextcloud.
appliances (Docker, Snappy, VM, NCP) This sub-category covers all questions related to the official appliances
collabora Support on configuring and using the Collabora Nextcloud Integration. For installation questions, use the install category.

About the support category [support] (1)
Slow WebDAV performance [support] (13)
Insanely slow page loads :( [support] (3)
Internal Server Error - Setting Page [appliances (Docker, Snappy, VM, NCP)] (6)
Upgrade from 11 to 12 results in a blank UI [support] (3)
Nextcloud infinite redirect loop when not using browser [support] (2)
SPDyn updater not working? ( 2 ) [appliances (Docker, Snappy, VM, NCP)] (24)
Sync failed failed to open stream: Permission denied at /var/www/html/nextcloud/lib/private/Files/Storage/Local.php [support] (1)
Nextcloud Error: Could not generate a preview of this file [support] (4)
Slow upload speed [support] (9)
Ubuntu 18.04 and next cloud [support] (13)
Help with install (ace) [support] (3)
[NextCloudPI] Not able to renew letsencrypt certificate [appliances (Docker, Snappy, VM, NCP)] (1)
[NextCloudPi] Best Practice to move Docker x86 to another Host [appliances (Docker, Snappy, VM, NCP)] (3)
Nextcloud can't be accessed over VPN [support] (3)
Nextcloud not available [support] (5)
Best cheap hardware to run Nextcloud on? ( 2 3 4 5 6 7 8 9 10 11 12 ) [appliances (Docker, Snappy, VM, NCP)] (222)
Mkdir(): Permission denied ... CacheMountProvider.php#61 [support] (1)
Integrate nextcloud samba 4 linux [support] (1)
Update from Nextcloud 10 [support] (3)
Antivirus w/ encryption [support] (6)
Logout takes some time [support] (1)
Integrity Check - Missing file(s) [appliances (Docker, Snappy, VM, NCP)] (4)
Authorization in 2 different databases [support] (5)
Migrate from snap install to manual install [appliances (Docker, Snappy, VM, NCP)] (4)
Uploading small individual files fails [support] (4)
Nextcloud and NextcloudPi Webinterface not reachable after installing ImageMagick [appliances (Docker, Snappy, VM, NCP)] (6)
Can I delete these tables? [support] (6)
Can I install Nextcloud 13 Snap on Ubuntu Server 18.04? [support] (1)
XU4 with EMMC - Move Data Dir to External Hard Drive - Permission Issues [appliances (Docker, Snappy, VM, NCP)] (1)