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CultureNotFoundException when selecting an LCID 4096 language in OWA for Exchange Server 2016

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Symptoms

Consider the following scenario:
  • Microsoft Exchange Server 2016 Cumulative Update 7 (CU7) is installed on a computer that's running Windows Server 2016.
  • A user signs in Outlook on the web (Outlook Web App) and tries to change the language through:
    OWA > Options > General > Region and time zone settings.

  • The user selects the language that has an LCID value of 4096, for example, English Belgium.

In this scenario, the user receives a "something went wrong" error message and OWA crashes. This issue prevents the user signing in until the administrator changes the language setting back to a supported one. In addition, you may find the following event logs are recorded:

Exception type: System.Globalization.CultureNotFound
Exception Exception message: Culture isn't supported. Parameter name: culture 4096 (0x1000) is an invalid culture identifier.

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Cause

This issue occurs because the newly-added cultures don't have valid LCIDs.

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Resolution

For Exchange Server 2016, install Cumulative Update 9 or a later cumulative update for Exchange Server 2016.

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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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References

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

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Keywords: select/change a language in Outlook on the web (Outlook Web App), CultureNotFoundException and "culture 4096 (0x1000) is an invalid culture identifier" error, kbexpertiseadvanced, kbqfe, CI74217, kbfix, kb, selects the language that has a LCID value of 4096, for example, English Belgium, kbContentAuto, kbsurveynew

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Article Info
Article ID : 4073531
Revision : 7
Created on : 3/7/2018
Published on : 3/20/2018
Exists online : False
Views : 299