skip to primary navigationskip to content
 

Outlook 2013 synchronisation problem

Outlook 2013 can go into a spin and constantly upload duplicate messages, which it has cached locally, back onto Hermes. We have seen cases of many thousands of messages (including recently deleted ones) in a folder. Typically this affects the inbox, although we have seen cases where other folders are affected.

Last updated: September 2014

The root cause appears to be a corrupt offline Outlook Data File (the OST file). The problem appears to be caused by virus scanner plugins to Outlook.

Microsoft does not recommend trying to repair an offline Outlook Data File, so if you experience this problem you need to remove the corrupted file so that Outlook can create it again.

To do this:

  1. Find where the .ost file is from within Outlook by going to File -> Account Settings -> Account Settings
  2. Select the Data Files tab, then select the file and then click Open File Location. This opens the directory that contains this file in File Explorer (or Windows Explorer, depending on your version of Windows). For example, in Windows 8.1, for the user dpc99, it would be C:\Users\dpc99\AppData\Local\Microsoft\Outlook\dpc99@cam.ac.uk.ost 
    (If you need to open File Explorer or Windows Explorer explicitly then, in Windows 8.1, search for File Explorer. In Windows 7 you can get to Windows Explorer by choosing the Start Menu -> All Programs -> Computer.)
  3. Close the Account Settings window but leave the File Explorer (or Windows Explorer) window open
  4. Exit Outlook (otherwise the final step will fail)
  5. Right click on the Outlook Data File in File Explorer (or Windows Explorer) then pick Delete to remove it.

The same procedure can also be found in the last section of the following page from Microsoft - http://office.microsoft.com/en-gb/outlook-help/repair-outlook-data-files-pst-and-ost-HA102749454.aspx

When you re-start Outlook the OST file will be recreated.

UIS Service Status

Phone padded  Service status line: (01223 7)67999
Website  Sign up for SMS/email status alerts
Website  Read major IT incident reports

UIS bITe-size bulletin


A regular newsletter aimed at the University's IT community, highlighting service and project news from UIS.

Sign up >

RSS Feed Latest news

Wireless service maintenance 08:00–09:00 Tuesday 9 March

Mar 04, 2021

The University Wireless Service will be undergoing maintenance between 08:00 and 09.00 on Tuesday 9 March. During this period, users may experience interrupted service to eduroam, the UniOfCam guest system, the UniOfCam-IoT system and local SSIDs.

CHRIS, ESS and UPS unavailable all day on Thursday 4 March

Feb 25, 2021

CHRIS, Employee Self-Service (ESS) and the University Payment System (UPS) will be unavailable all day on Thursday 4 March while we install the latest upgrade to the CHRIS system.

View all news