@Matti Parkkonen - Thanks for the question and using MS Q&A platform.
If your certification expires, you must earn the certification again by passing the required exam(s). For more information, visit our Certification expiration policy. Note: Yes, there is no reminder available to inform if you are nearing the Six-month renewal window. Since, it's Six-month renewal window is expired, you need to re-take the dp-203 exam.
For more details, refer to About certification renewal.
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