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Consider the following scenario:

  • You have a Microsoft Exchange Server 2016 environment or a mixed environment that has Exchange Server 2013 and Exchange Server 2016.

  • Cumulative Update 5 is installed on Exchange Server 2016.

  • You have an email address policy that generates the first name or last name (%g, %s) as the primary email address for mailboxes. Your email address policy may be like this:


  • In the Exchange environment, a user object has one of the following umlaut characters in the first or last name: 

    ü, Ü, Ö, ö, Ä, ä, Å, å, ß, ÿ

In this scenario, you encounter the following issues:

  • You receive the following error message when you try to update a mailbox by using the Enable-Mailbox or Set-Mailbox command:

    Processing data for a remote command failed with the following error message: [ClientAccessServer=ServerName,BackEndServ,RequestId=RequestId,TimeStamp=DateTime] [FailureCategory
    =WSMan-Others] For more information, see the about_Remote_Troubleshooting Help topic.
        + CategoryInfo          : OperationStopped: ( [], PSRemotingTransportException
        + FullyQualifiedErrorId : JobFailure
        + PSComputerName        :

    Unhandled Exception: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

  • You receive the follolwing error message when you try to update a mailbox in Exchange Admin Center:

    The address 'SMTP:ÿ' is invalid: Specified argument was out of the range of valid values. Parameter name: The address 'ÿ' is not a valid SMTP address.


To resolve this issue, install Cumulative Update 6 for Exchange Server 2016.

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