Office365 Hybrid "Subtask CheckPrereqs execution failed: Creating Organization Relationships"

We're currently trying to migrate from Exchange 2010 (SP2) to Office 365. Everything is set-up and Single-Sign-On is working great (with AD FS). Because we are a large organization we decided to use the "hybrid" deployment.

After completing the steps Microsoft provides we get an error message saying "The signup domain 'nl' derived from 'ouderdomain.nl' is not a valid domain

   at Microsoft.Exchange.Management.Hybrid.Engine.ExecuteTask(TaskBase taskBase, TaskContext taskContext)
'.".

Attached you'll find the error message and the complete log.

Ownership verified via TXT recordOutputErrorMessage.doc
Log.doc
TheCybexAsked:
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Simon Butler (Sembee)Connect With a Mentor ConsultantCommented:
I think you will need to log a call with Microsoft through the Office365 portal so that they can configure their systems to work with your domain. This is not something that you can resolve yourself without assistance from Microsoft.

Simon.
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