- In the table of servers on the Home page of Enterprise Server Administration, click 
                  		  Edit to the left of the row for the server for which you want to enable MSS. 
                  		
               
- Click the 
                  		  MSS tab. 
                  		
               
- Check 
                  		  Mainframe Subsystem Support enabled. 
                  		  
                  This is the minimum you need do to enable MSS. By default the enterprise server uses the SIT DFH$IVP. The startup lists, groups
                     and resources used by the enterprise server will, therefore, be those defined by DFH$IVP. 
                     		  
                   
- If you want to use a SIT other than DFH$IVP, specify the name of the SIT in 
                  		  System Initialization Table. 
                  		  
                  If you want to set a SIT that has a $ (dollar) character in its name you have to escape the $ character, for example MY\$SIT:
                     
                     		  
                   
- If you specified a SIT other than DFH$IVP, specify CICS search paths, unless you are enabling MSS for JCL rather than CICS, in which case search paths are not required. 
                  		
               
- Click 
                  		  Apply. 
                  		
               
- Restart your server. The enterprise server will start as a MSS-enabled enterprise server, using either the default SIT, or
                  the SIT you specified. 
                  		
               
Note: You can disable or re-enable MSS by unchecking or checking 
               		Mainframe Subsystem Support enabled, then clicking 
               		OK and stopping and restarting the enterprise server.