Applications that the user is subscribed to

You could try the .List() method, however you'd probably need to execute it within a RunAs context as this method appears to execute against the Accessing user.

set($pagedListResponse = $core_v2_applicationSubscription.List("%{ ApplicationId = $applicationIdArg, ApplicationTypeId = $applicationTypeIdArg, ContainerId = $containerIdArg, IncludeSubContainers = $includeSubContainersArg, PageIndex = $pageIndexArg, PageSize = $pageSizeArg, TypeId = $typeIdArg }"))

You could try the .List() method, however you'd probably need to execute it within a RunAs context as this method appears to execute against the Accessing user.

set($pagedListResponse = $core_v2_applicationSubscription.List("%{ ApplicationId = $applicationIdArg, ApplicationTypeId = $applicationTypeIdArg, ContainerId = $containerIdArg, IncludeSubContainers = $includeSubContainersArg, PageIndex = $pageIndexArg, PageSize = $pageSizeArg, TypeId = $typeIdArg }"))