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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 26.01
Operating system and version (eg, Ubuntu 20.04): Ubuntu 22.04.2 LTS
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.52
PHP version (eg, 7.4): PHP 8.1
The issue you are facing:
10 users total
2 users get disabled immediately after being re-enabled
Logs audit.log and nextcloud.log don’t appear to blatantly call out the disabling user activity, nor the cause for it.
This has been going on for several version upgrades now and needs to be corrected.
I’m asking for a process by which other folks have determined why a user was disabled, so that the issue can be remediated.
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- Enable user
- Have user log in.
- User either cannot, already disabled, or gets the pop-up reauthenticate prompt shortly after logging in.
The output of your Nextcloud log in Admin > Logging:
PASTE HERE
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'auth.bruteforce.protection.enabled' => false,
'datadirectory' => '/mnt/ncdata',
'dbhost' => 'localhost',
'dbname' => 'nextcloud_db',
'dbpassword' => 'MooseAndSquirrel', // redacted
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbtype' => 'pgsql',
'dbuser' => 'Bullwinkle', // redacted
'default_language' => 'en',
'default_phone_region' => 'US',
'enable_previews' => true,
'filelocking.enabled' => true,
'installed' => true,
'instanceid' => 'AAAAAnAAAAA', // redacted
'jpeg_quality' => '60',
'log_rotate_size' => '0',
'log_type' => 'file',
'logfile' => '/var/log/nextcloud/nextcloud.log',
'loglevel' => '1',
'logtimezone' => 'America/Chicago',
'mail_domain' => 'My Domain.TLD', // redacted
'mail_from_address' => 'Rocky', // redacted
'mail_sendmailmode' => 'smtp',
'mail_smtphost' => 'bridge.My Home Domain.TLD', // redacted
'mail_smtpmode' => 'smtp',
'mail_smtpport' => '25',
'maintenance_window_start' => '1',
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.local' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'overwrite.cli.url' => 'My Home Domain.TLD', // redacted
'overwritecondaddr' => '^NNN\\.NNN\\.NNN\\.NNN$', // redacted
'overwritehost' => 'My Home Domain.TLD', // redacted
'overwriteprotocol' => 'https',
'passwordsalt' => 'Bullwinkle', // redacted
'preview_max_x' => '2048',
'preview_max_y' => '2048',
'remember_login_cookie_lifetime' => '1800',
'secret' => 'MooseAndSquirrel', // redacted
'simpleSignUpLink.shown' => false,
'trashbin_retention_obligation' => 'auto, 180',
'twofactor_enforced' => 'false',
'upgrade.disable-web' => 'false',
'version' => '26.0.1.1',
'enabledPreviewProviders' =>
array (
0 => 'OC\\Preview\\PNG',
1 => 'OC\\Preview\\JPEG',
2 => 'OC\\Preview\\GIF',
3 => 'OC\\Preview\\BMP',
4 => 'OC\\Preview\\MarkDown',
5 => 'OC\\Preview\\MP3',
6 => 'OC\\Preview\\TXT',
7 => 'OC\\Preview\\Movie',
8 => 'OC\\Preview\\Photoshop',
9 => 'OC\\Preview\\SVG',
10 => 'OC\\Preview\\TIFF',
),
'versions_retention_obligation' => 'auto, 365',
0 =>
array (
'apps' =>
array (
0 => 'admin_audit',
),
),
'redis' =>
array (
'host' => '/run/redis/redis-server.sock',
'port' => 0,
),
'trusted_domains' =>
array (
0 => 'localhost',
1 => '127.0.0.1',
2 => '127.0.1.1',
3 => 'NNN.NNN.NNN.*', // redacted
4 => 'My Home Domain.TLD', // redacted
),
'trusted_proxies' =>
array (
0 => 'NNN.NNN.NNN.NNN', // redacted Proxy Server Address
),
'maintenance' => false,
'memories.exiftool' => '/var/www/nextcloud/apps/memories/exiftool-bin/exiftool-amd64-glibc',
'memories.vod.ffmpeg' => '/usr/bin/ffmpeg',
'memories.vod.ffprobe' => '/usr/bin/ffprobe',
'memories.vod.path' => '/var/www/nextcloud/apps/memories/exiftool-bin/go-vod-amd64',
'memories.vod.disable' => false,
'memories.gis_type' => 2,
);
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
PASTE HERE
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
PASTE HERE