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What's happening?

Dynamics 365 Customer Service randomly skips case numbers during automatic generation, causing confusion in tracking and invoice verification processes.

Reason:

This behavior occurs when a case record is deleted. When a case record is deleted, the system will not reuse the case number from the deleted case. This behavior is by design and not indicative of a system malfunction.

Resolution:

This is an expected behavior and not indicative of a system defect. To avoid confusion, it is recommended to: