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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, 12.0.2): 14.0.3
Operating system and version (eg, Ubuntu 17.04): Ubuntu 16.04
Apache or nginx version (eg, Apache 2.4.25): Server version: Apache/2.4.18 (Ubuntu)
PHP version (eg, 7.1): PHP 7.1.23-3+ubuntu16.04.1+deb.sury.org+1 (cli) (built: Oct 25 2018 06:43:19) ( NTS )
The issue you are facing:
We use 0B Quota in advanced ldap-settings to prevent Users creating files or folderes outside external storages. This worked fine in NC 13.
After updating to NC 14 we can’t upload files bigger than 10 MB through Desktop Client and WebUI.
Is this the first time you’ve seen this error? (Y/N):Y
Steps to replicate it:
- Set 0B Quota in LDAP/AD-Intergration - Advanced Settings
- Put an file bigger than 10MB in your locally synced folder
- You get an error message
The output of your Nextcloud log in Admin > Logging:
NONE
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
The output of your Apache/nginx/system log in /var/log/____:
none