Microsoft KB Archive Search

Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

  1. Home
  2. IMAP with NTLM fails if a user's UPN and primary SMTP address don't match in Exchange Server 2013

IMAP with NTLM fails if a user's UPN and primary SMTP address don't match in Exchange Server 2013

View products that this article applies to.

Symptoms

This issue occurs when your user principal name (UPN) differs from your primary SMTP address in a Microsoft Exchange Server 2013 environment. 

When this issue occurs, Internet Message Access Protocol (IMAP) doesn't work with the Windows Challenge/Response (NTLM) authentication protocol.

↑ Back to the top

Resolution

To fix this issue, install Cumulative Update 13 for Exchange Server 2013 or a later cumulative update for Exchange Server 2013.

↑ Back to the top

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

↑ Back to the top

References

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

↑ Back to the top

Keywords: kbqfe, kbsurveynew, kbfix, kbexpertiseinter, kb

↑ Back to the top

Article Info
Article ID : 3150799
Revision : 1
Created on : 1/7/2017
Published on : 6/21/2016
Exists online : False
Views : 255