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Sorry to hear you’re facing problems 
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Nextcloud version (eg, 20.0.5): 25.0.2
Operating system and version (eg, Ubuntu 20.04): NethServer 7.9.2009
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.6
PHP version (eg, 7.4): 5.4.16
The issue you are facing: I installed the Welcome app and uploaded my welcome.md file in the ‘theming’, menu, logged in as administrator. I also check-marked ‘disable user theming’ and saved the changes. When I personally logged in after this, the welcome markdown didn’t show up. After I selected it under the dashboard customize feature I then see it. I would like to force this widget for all new users, disable the status and weather widgets, and disable the customize button. Can you tell me how to accomplish this? Currently, it’s always the ‘recommended files’ widget that pops up. Thanks.