Cisco Unity Connection

Outlook 2013 IMAP Connections to Unity Connection Might Cause High CPU

Document ID: 116938

Updated: Dec 14, 2013

Contributed by Justin Dew, Cisco TAC Engineer.



This document describes an issue seen with Microsoft Outlook 2013 clients when they make Internet Message Access Protocol (IMAP) connections to Unity Connection in order to view voicemail.


When you use Outlook 2013 to make an IMAP connection to Unity Connection, high CPU might be reported on Unity Connection.

Look for this line in the IMAP traces:

Request: xuf2 UID SEARCH UID 45:4294967295 SINCE


First, check to see if KB2837618 is installed on the PC which runs Outlook 2013. If this is installed on the PC, uninstall the patch and restart the computer.

Once you have uninstalled the patch from all Outlook 2013 clients that make an IMAP connection to Unity Connection, the CPU on Unity Connection should drop.

This issue is tracked with Cisco bug ID CSCul49976, UID SEARCH UID command causes high CPU usage in Unity Connection.

Related Information

Updated: Dec 14, 2013
Document ID: 116938