An rs1x file extension stores some kind of data used by Microsoft PowerShell ASP from IIS web server.
Software that open rs1x file
RS1X file extension - Microsoft PowerShell ASP data
What is rs1x file? How to open rs1x files?
File type specification:
The rs1x file extension is associated with the Microsoft PowerShell ASP, a software included in Microsoft Internet Information Services a web server for Microsoft Windows and Windows Server systems.
The rs1x file stores data used by Microsoft PowerShell ASP.
The default software associated to open rs1x file:
Microsoft Internet Information Services 
Company or developer:
Microsoft Corporation
Microsoft Internet Information Services (IIS) is web server application distributed with Microsoft Windows Server as well as some editions of Microsoft Windows. IIS supports HTTP, HTTPS, FTP, FTPS, SMTP and NNTP protocols.
List of recommended software applications associated to the .rs1x file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open rs1x file, edit rs1x file, convert rs1x file, view rs1x file, play rs1x file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with rs1x file - Microsoft PowerShell ASP data
Click on the software link for more information about Microsoft Internet Information Services. Microsoft Internet Information Services uses rs1x file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
