When attempting to restart the SOAP stream service from the PVS console, it gives a "failed" message, however the Citrix PVS stream service can be restarted successfully from windows services.msc MMC snap-in.

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In order to restart the stream service from the Citrix Provisioning (PVS) console, the network service will need to be allowed to restart the stream service. The ability for the network service to restart a service is not enabled by default in Windows for security. To set the required permissions:
 

1. Ensure the stream service is running on the Citrix Provisioning (PVS) server
2. Download and extract process explorer onto the PVS server, it can be obtained here: https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer
3. Run Process explorer as an administrator
4. Locate the process for the stream service (streamservice.exe)
5. Right click on the process and select properties
6. Click on the services tab
7. Click permissions which now brings you to the Access Control List (ACL) for the service.
8. Add the Windows Network service but do not grant any permissions from the tick boxes below.
9. Click on advanced permissions
10. Click on Network Service and click edit
11. Click on special permissions
12. Select Start, Stop and Pause/Resume permissons and click ok.
13. Click ok on the remaining open windows until you are back to process explorer itself.
14. Restart the PVS server

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Problem Cause

Accounts such as those used with the PVS console that utilize the network service cannot restart services by default on windows systems so the ACL for the stream service network account needs to be edited and only Start, Stop and Pause/Resume permissions added.

See "Important Considerations" heading in this documentation page:https://docs.citrix.com/en-us/provisioning/current-release/configure/configure-server.html