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"Can't find the organizational unit that you specified" error when you manage a user in EAC

Symptoms
If a user belongs to an organizational unit (OU) whose name includes a forward slash, you cannot manage that user by using the Exchange Admin Center (EAC). If you try to open the user's properties, you receive the following error message: 

Can't find the organizational unit that you specified. Make sure that you have typed the OU's identity correctly.
Cause
When the property page is rendered, one of the cmdlets that runs in the background is Get-UserPrincipalNamesSuffix. The OU property that is passed to this cmdlet is formed when Get-Mailbox is run and is retrieved from the OU property of the user. 

This problem occurs because the OU property of the user contains an incorrectly escaped forward slash. For example, if "My OU/" is the name of the OU, "My OU\/" would be the properly escaped version. Passing "My OU\/" to Get-UserPrincipalNamesSuffix would let the cmdlet run correctly. However, "My OU/" is instead passed to Get-UserPrincipalNamesSuffix. In this situation, the cmdlet fails and returns the error message that is mentioned in the "Symptoms" section.
Workaround
To work around this problem, use one of the following methods.

Workaround 1

Use the Exchange Management Shell to manage the affected user accounts.

Workaround 2

Avoid the use of OUs that contain forward slashes in their names when you store users and groups that will be used by Microsoft Exchange Server.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Properties

Article ID: 3173169 - Last Review: 06/27/2016 19:03:00 - Revision: 2.0

  • KB3173169
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