Adding connected organizations with powershell

philtyrich,

Hi, it appears that this is a known issue when using Azure AD or MSOnline PowerShell modules, which will be discontinued. Instead, please use the Microsoft Graph API.

Please check this article:
https://learn.microsoft.com/en-us/powershell/module/microsoft.graph.identity.signins/update-mgpolicycrosstenantaccesspolicypartner?view=graph-powershell-1.0

This could also be helpful. Perhaps it requires updates. Before making any changes, it’s best to test it first:

Install-Module Microsoft.Graph -Scope CurrentUser

Import-Module Microsoft.Graph

Connect-MgGraph -Scopes "Policy.ReadWrite.CrossTenantAccess", "Directory.Read.All"

#Set up the tenantId first (resolve via Get-MgDomain)
$tenantId = "external-tenant-guid" (Must be the GUID)

#Add the org
$params = @{
    B2bCollaborationInbound = @{ isEnabled = $true }
    B2bCollaborationOutbound = @{ isEnabled = $true }
    IdentitySynchronization = @{ isEnabled = $false }
    InboundTrust = @{
        isCompliantDeviceAccepted = $false
        isHybridAzureADJoinedDeviceAccepted = $false
        isMfaAccepted = $false
    }
}

Update-MgPolicyCrossTenantAccessPolicyPartner -TenantId $tenantId -BodyParameter $params