@Pa_D Thanks for posting in our Q&A.
For this issue, currently, there is no method to configure "Provide unique identifier for your organization" via intune. I find someone has the same requirement in intune uservoice. We can vote here. This is a place to collect customers' requirements and problems.
https://microsoftintune.uservoice.com/forums/291681-ideas/suggestions/41469799-bitlocker-policy-provide-the-unique-identifiers-f
Given this situation, I just have an idea. Maybe we can write Powershell Scripts to set "Provide unique identifier for your organization" and deploy the Powershell Scripts via intune.
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