Hi all,

I’m adding some more information regarding Outlook latency causes that can be on the Desktop side.


> Outlook 2007/2010 – More precisions about Antivirus exclusions and things that can slow down your messaging client in general




> Plan antivirus scanning for Outlook 2010



- We recommend that you turn off scanning of the following Microsoft Outlook files:

  • *.oab (Outlook address book files)

    %userprofile%\AppData\Local\Microsoft\Outlook\Offline Address Books\<guid>

  • *.srs (send/receive settings files)


  • Navigation pane settings file profile_name.xml files

    %userprofile%\AppData\Roaming\Microsoft\Outlook\<profile name>.xml

    where <profile name> is the name of the Outlook messaging profile, as shown in the Control Panel, Mail applet.

  • outlprnt (print styles)


-  If you use antivirus software to perform file-level scanning [Outlook files], while Outlook is in use, data corruption issues might result.

- We we do not recommend that you scan *.pst, *.ost, and other Outlook files directly. Instead, we recommend that you scan email message attachments on the email server and on the Outlook client computer.


> How to troubleshoot performance issues in Outlook 2010



- The performance issues may be caused by one or more of the following: 

  • Insufficient computer specifications
  • Absence of the latest service pack for Outlook 2010
  • Large Personal Folders files (.pst) or Offline Folder files (.ost)
  • Outlook .ost files or .pst files that are stored on a drive with insufficient write performance
  • Third-party add-ins
  • Gadgets that access Outlook data (Windows Vista only)
  • Microsoft Office Communicator integration
  • Antivirus software interaction
  • Windows Desktop Search indexing
  • Incomplete closure of .pst files or .ost files
  • POP3 accounts on Windows Vista clients
  • Many Really Simple Syndication (RSS) feeds
  • To-Do Bar and Online mode with Exchange server
  • Damaged Outlook messaging profile