The only thing I do not like is: currently the MySQL server is running on the same server as ONLYOFFICE DS. I have another server running MySQL. Is that possible to config OO DS to let it using that external MySQL server?
If it is, how can export (using mysqldump) the current database handled by OO DS snap install?
After that you have to restart all Document server services.
Please note that we didn’t test this scenario (external database for snap installation), so we can’t provide support or predict possible issues. At first sight, you might face issues with AppArmor profiles.