Specify the service principal names (SPNs) list to update (and overwrite) the existing list with. If this is set to NULL, ...

              Specify the service principal names (SPNs) list to update (and overwrite) the existing list with.  If this is set to NULL, the existing property will not be updated.  If this is set to an empty list, the existing SPNs will be cleared, except for the SPN containing the service principal's AppId value.
              An SPN must use one of the following formats "appName" or "appName/hostname" or be a valid URL.
English
English (United States)
Deutsch (Deutschland)
German (Germany)
Español (España)
Spanish (Spain)
Français (France)
French (France)
italiano
Italian
日本語
Japanese