I thank Dmitry and his team for their high-quality work! Now it has become clear to me that the work of a competent sysadmin is to initially configure the entire infrastructure so that there will not be an endless stream of problems later.
We rent a server for our organization, the specialists quickly arranged everything, configured all the parameters and provided services. They gave remote access to the accountant. For half a year of joint cooperation, there have been no problems. All problems that arise are solved very quickly.