HTTP 400 Bad Request calling Datasets - Update Datasources In Group REST method

[jsnape]

I am writing a script that users can run to update all their DNS based analysis services connections to the new link:// alias style connection. The whole script is below:

#Requires -Version 5
Set-StrictMode -Version Latest

Install-Module -Name MicrosoftPowerBIMgmt -Scope CurrentUser
Import-Module MicrosoftPowerBIMgmt
Connect-PowerBIServiceAccount

try {
    $groups = Invoke-PowerBiRestMethod -Url 'https://api.powerbi.com/v1.0/myorg/groups/' -Method GET | ConvertFrom-Json

    foreach ($group in $groups.value) {
        Write-Host "Processing group $($group.name)"
        $groupId = $group.id
        $dataSets = Invoke-PowerBiRestMethod -Url "https://api.powerbi.com/v1.0/myorg/groups/$groupId/datasets" -Method GET | ConvertFrom-Json

        foreach ($dataset in $datasets.value) {
            Write-Host "Processing dataset $($dataset.name)"
            $dataSetId = $dataset.id

            $dataSourceUri = "https://api.powerbi.com/v1.0/myorg/groups/$groupId/datasets/$dataSetId/datasources"
            $dataSources = Invoke-PowerBiRestMethod -Url $dataSourceUri -Method GET | ConvertFrom-Json

            if (-not $dataSources) {
                Resolve-PowerBIError -Last
                continue
            }

            $updates = $dataSources.value |
                Where-Object { $_.datasourceType -eq 'AnalysisServices' } |
                Where-Object { $_.connectionDetails.server -match 'cube\.ds-\w*\.foobar\.com' } |
                ForEach-Object {
                    $update = [pscustomobject] [ordered] @{
                        datasourceSelector = [pscustomobject] [ordered] @{
                            datasourceType = $_.datasourceType
                            connectionDetails = $_.connectionDetails
                        }
                        connectionDetails = [pscustomobject] [ordered] @{
                            server = "link://wibble.foobar.com"
                            database = $_.connectionDetails.database
                        }
                    }

                    Write-Output $update
                }

            if ($null -eq $updates)
            {
                continue
            }

            Write-Host "Found analysis services connections"

            $updateDetails = @{
                updateDetails = $updates
            }

            Write-Host "Updating connection details" -ForegroundColor Cyan

            $body = $updateDetails | ConvertTo-Json -Depth 10
            $url = "https://api.powerbi.com/v1.0/myorg/groups/$groupId/datasets/$dataSetId/Default.UpdateDatasources"
            $updateResponse = Invoke-PowerBiRestMethod -Url $url -Method POST -Body $body -ErrorAction Stop | ConvertFrom-Json

            Write-Output $updateResponse
        }
    }
}
catch {
    Resolve-PowerBIError -Last
}

The final post body looks fine according to the docs but I get a Bad Request response from the service.

With no additional clues I have no idea what to try next.

[Anonymous]

Did you have a resolution for this issue?