Symptoms
In a Microsoft Exchange Server 2016 environment, Exchange Web Services (EWS) and Outlook are inconsistent with the definition of the PostalAddressIndex property, for example:
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If you set the index to Business in Outlook, you will get it as set to Home with EWS.
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If you set the index to Home in Outlook, you will get it as set to Business with EWS.
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If you set the index to Business in EWS, you will get it as set to Home with Outlook.
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If you set the index to Home in EWS, you will get it as set to Business with Outlook.
Cause
This issue occurs because the enumerated values (Home and Business) in PhysicalAddressIndexType are flipped.
Resolution
To fix this issue, install Cumulative Update 5 for Exchange Server 2016 or a later cumulative update for Exchange Server 2016.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.
