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MailTip shows wrong number of users for a distribution group if the users are in different domains in Exchange Server 2019 and 2016

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Symptoms

In a Microsoft Exchange Server 2019 or Exchange Server 2016 environment, assume that you have a large distribution group that contains many users. When the users are in different domains (for example, some users are in the domain where the distribution group locates in, and the other users are in a different domain), you may experience that the MailTip shows an incorrect count of the group members.

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Cause

This issue occurs because Exchange Server just counts the group members who are using the same domain as the distribution group.

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Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. 

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Resolution

To fix this issue, install one of the following updates:
For Exchange Server 2019, install the Cumulative Update 1 for Exchange Server 2019 or a later cumulative update for Exchange Server 2019.
For Exchange Server 2016, install the Cumulative Update 12 for Exchange Server 2016 or a later cumulative update for Exchange Server 2016.

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References

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

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Keywords: the users of a distribution group are in different domains, kb, kbfix, kbqfe, mailtip shows wrong number of users for a distribution group, kbHotfixAuto, CI97379

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Article Info
Article ID : 4488259
Revision : 6
Created on : 2/12/2019
Published on : 2/12/2019
Exists online : False
Views : 295