The following rule sets access rights to files in the error_docs folder on domain example.com for the Windows user account named domainuser1.

Security rule entry 

<Entry AccounType="1" Account="domainuser1" SidStr="S-1-5-21-821798554-1223697094-3523996037-1043" Path="[HTTPD_VHOSTS_D]" SubPath="example.com\error_docs\*.*" AceFlags="FilesOnly" AccessMask="ReadWrite" EntryFlags="0x80" Tag="DomainUser" Tag2="" />

Note: When entry flag 0x80 is included in a security rule entry, the path to the objects defined by the SubPath attribute must include a file mask. This example uses file mask *.*.

Explanation

Because the name domainuser1 is not a standard system account name, it has to be resolved in the system (hence, AccounType="1"). The optional SidStr attribute is defined to improve Plesk stability. The HTTPD_VHOSTS_D component path in the Path attribute specifies the common part of the path to the domain root folder where the example.com folder is located. The SubPath attribute completes the path to the error_docs folder to which the rule will be applied. AceFlags="FilesOnly" specifies that, according to this rule, an ACE with permission defined by AccessMask="ReadWrite" will be created and added only to the error_docs folder and all files contained within that folder. However, EntryFlags="0x80" further restricts the ACE creation only to the files within the folder, excluding the error_docs folder from this rule. Tag="DomainUser" designates the security rule as pertaining to a domain hosting account and is used by Plesk to properly organize the processing of security metadata.