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Infinite loop in Recurrence.GetNumberOfYearsBetween() with the Japanese calendar in Exchange Server 2019 and 2016

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Symptoms

When there's a recurring calendar item based on Japanese Lunar calendar, Recurrence.GetNumberOfYearsBetween() can go into an infinite loop in Microsoft Exchange Server 2019 or Exchange Server 2016. This saturates CPU and makes EWS unusable for all users.

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Resolution

To fix this issue, install one of the following updates:

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References

Learn about the terminology that Microsoft uses to describe software updates.

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Keywords: infinite loop in Recurrence.GetNumberOfYearsBetween(), kb, kbfix, kbqfe, kbHotfixAuto, CI105648

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Article Info
Article ID : 4515266
Revision : 7
Created on : 9/17/2019
Published on : 9/17/2019
Exists online : False
Views : 283