Tag: ImmutableID

ImmutableID – mS-DS-ConsistencyGuid – ADConnect – final part

One of the most looked at topics on this blogpost is the ImmutableID series for Azure AD Connect and AADSync. And I wanted to give an update to this, given the latest versions of Azure AD Connect seemed to have adopted the idea to use the ms-ds-ConsistencyGuid (or any other value) to replace the ImmutableID used for synchronization. Don’t worry, please keep reading the other posts, as they clearly explain the how behind the idea of using the alternative ImmutableID.. and this post is just to tell you.. Microsoft has made the implementation a lot easier!

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ImmutableID – mS-DS-ConsistencyGuid – AADSync

Paul Williams talked in his blog about using another attribute from on-premises Ad’s to act as the ImmutableID for Azure Active Directory (http://blog.msresource.net/2014/03/10/windows-azure-active-directory-connector-part-3-immutable-id/)

While making a very detailed blog entry on why and which attribute to choose, there wasn’t a guide on how to make this work in AADSync.

[update 21-Aug-2017: The latest version of Azure AD Connect have the functionality built-in to select the ImmutableID. There is no need to hack the rules manually anymore.. read more about it at: http://blog.azureinfra.com/2017/08/21/immutableid-ms-ds-consistencyguid-adconnect-final-part/]

So a recent project got me thinking about this. In this particular scenario there is already a forest (1 domain) using DirSync to replicate their users to AAD, and the requirement is to prepare for an AD migration, while also adding other users to the same AAD tenant. As usual, user objects might be duplicate between the two forests and we want to use the mS-DS-ConsistencyGuid attribute to be the immutableID.

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