Symptoms
Consider the following scenario:
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You have an Exchange Server forest in a Microsoft Exchange Server 2016 or a Microsoft Exchange Server 2013 environment.
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The Exchange Server forest contains parent and child domains.
In this scenario, if a public folder mailbox exists in the root domain, and you run the Enable-MailPublicFolder cmdlet from a child domain against the public folder, you receive a System.InvalidOperationException exception that states that the mailbox cannot be located.
Note This problem also occurs in the reverse scenario. If a public folder mailbox exists in the child domain, and you run the Enable-MailPublicFolder cmdlet from the root domain against the public folder, you receive a System.InvalidOperationException exception that states that the mailbox cannot be located.
Cause
This problem occurs because the search cannot locate a public folder that is in a different domain controller domain.
Resolution
Exchange Server 2016
To resolve this problem, install Cumulative Update 10 for Exchange Server 2016 or a later cumulative update for Exchange Server 2016.
Exchange Server 2013
To resolve this problem, install Cumulative Update 21 for Exchange Server 2013 or a later cumulative update for Exchange Server 2013.
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.
