PowerShell

Active Directory: Force replication of all Domain Controllers on all Sites at once

Active Directory Domain Services uses pull replication to replicate Active Directory Partitions. This means that the Domain Controller on which replication is started receives the data from the source Domain Controller. It’s like a one way ticket.

If you want to replicate all Domain Controllers, then you have to start replication on each of them separately. This may take a while. To save time, I am going to show you a PowerShell One-Liner to force replication on all Domain Controllers of all Active Directory Sites. Let’s take a look at this One-Liner now.

Force Replication of all Domain Controllers on all Sites

Suppose, you have one Domain with multiple sites. (One Forest and one Forest Root Domain).

Log on to one of your Domain Controllers. Start Windows PowerShell with administrative privileges. The domain name and the domain partition don’t need to be specified. They will be filled automatically by Get-ADDomain. 😉

function Replicate-AllDomainController {
(Get-ADDomainController -Filter *).Name | Foreach-Object {repadmin /syncall $_ (Get-ADDomain).DistinguishedName /e /A | Out-Null}; Start-Sleep 10; Get-ADReplicationPartnerMetadata -Target "$env:userdnsdomain" -Scope Domain | Select-Object Server, LastReplicationSuccess
}

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Once completed, you get a nice overview with the computer names of the Domain Controllers and the time of the Last Replication Success.

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That’s it.

Have fun replicating your DC’s! More about repadmin here:

https://technet.microsoft.com/en-us/library/cc835086(v=ws.11).aspx

See also

PowerShell: Adding Active Directory Users from Text Files (Bulk)

Windows Server 2016: Configuring Time based Group Membership with PowerShell

PowerShell: Changing Active Directory user logon names (Bulk)

15 replies »

  1. Hi Patrick, Nice article – but when I run your code it only replicates DCs in the domain I ran it in. I have a 3-domain forest which means I need to run this on a dc in each domain in the forest. Is there a way to run once and have replication run against all DCs in all domains?

    Like

      • Thanks Patrick- sort of a hack myself so not sure I know how to do that… – i saw your article mentioned a 2 domain forest at the top – and yet it only covers one domain, so I asked. 🙂

        I did incorporate your one-liner function into an “invoke-Command” statement, where I just listed all my DC computer names in my forest. It works (even if it complains a little) but I imagine that’s not really the best way to get this done… 😉

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      • ok – my bad… no you don’t. You only mention 1 forest with 1 forest root. sorry…. but can you help a PoSH hack out?

        Like

  2. This is a great.
    Sorry if this is a newbie questions but is there any way this can be ran as a .PS1 script and not in PowerShell ISE?
    Thanks.

    Like

      • Thanks for the reply, thats a great resource in the downloads section.
        But it doesn’t replicate or show the overview of replication success when I run it as a PS1 script. But works if I run it in PSE.
        Probably a schoolboy error on my half. I’m just right clicking the PS1 script I got form your downloads section and selecting Run with PowerShell.

        Like

  3. Would be very helpful if you could explain what these powershell-snippets actually do. Such one-liners are often a little hard to read.

    Like

    • You only have to pay attention to the first two lines. Get-ADDomainController receives the Names of all DCs. This names are then piped to Foreach-Object that runs repadmin on all of them with no ouput (Out-Null). Then the script goes to sleep for 10 seconds. Afterwards ReplicationData from all DCs are retreived to view the replication status.

      For some it’s hard to read for others not. I love it.
      But yes, in complex scripts it’s more useful to use the common script struture.

      Like

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