An ssu file extension is related to the Systems Management Server Hierarchy Manager and used for its site update files.
Software that open ssu file
SSU file extension - Systems Management Server Hierarchy Manager site update
What is ssu file? How to open ssu files?
File type specification:
The ssu file extension is associated with the Microsoft Systems Management Server.
The ssu file contains site update data for Hierarchy Manager.
The System Management Server was replaced by the System Center Configuration Manager.
This ssu file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
The default software associated to open ssu file:
Microsoft Systems Management Server (SMS) 
Company or developer:
Microsoft Corporation
Systems Management Server is application used to manage large groups of Windows-based computer system. System Management Server was replaced by the System Center Configuration Manager.
List of recommended software applications associated to the .ssu 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 ssu file, edit ssu file, convert ssu file, view ssu file, play ssu file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with ssu file - Systems Management Server Hierarchy Manager site update
Click on the software link for more information about Microsoft Systems Management Server (SMS). Microsoft Systems Management Server (SMS) uses ssu 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.).
