One or more IIS log files is missing the <IISLogField> field (4210284)

You receive a warning similar to the following during the OWA, Windows Mobile Devices or Windows Mobile Default Gathering or in MessageStats 7.3 and newer in the Exchange Active Sync Task. 

"One or more IIS log files is missing the <IISLogField> field"

On all of your Client Access servers please do the following:

If you are running Internet Information Services 6 (IIS 6)

1. From the Start menu, select Run
2. Type inetmgr and click OK
3. In the treeview, browse to the websites node
4. Right-click the Default web site that you want and select Properties
5. On the Web Site property sheet, click Properties for the WC3 Entended Log File Format in the Enable Logging section
6. Select the Advanced tab (or the Extended Properties tab)
7. Select the following properties:
   - Date
   - Time
   - Client IP Address ( c-ip )
   - User Name ( cs-username )
   - Method ( cs-method )
   - URI Stem ( cs-uri-stem )
   - URI Query (cs-uri-query)
   - Bytes Sent (sc-bytes)
   - Bytes Received (cs-bytes)
   - Protocol Status ( sc-status )
   - User Agent ( cs(User-Agent) )
   - Cookie ( cs(Cookie) )
   - Referer ( cs(Referer) )
   - Time Taken (time-taken)

• Click OK twice and close the Console.

The Report Pack for OWA supports all of the IIS log schedule options with the exception of the Unlimited file size option.

If you are running Internet Information Services 7 (IIS 7)

1. From the Start menu, select Run
2. Type inetmgr and click OK
3. In the treeview, browse to the sites node
4. Select the Default web site and under the IIS section double click on the Logging Icon
5. Make sure the Log File format is WC3 and Click the Select Fields button
6. Check off the following properties
   - Date
   - Time
   - Client IP Address ( c-ip )
   - User Name ( cs-username )
   - Method ( cs-method )
   - URI Stem ( cs-uri-stem )
   - URI Query (cs-uri-query)
   - Bytes Sent (sc-bytes)
   - Bytes Received (cs-bytes)
   - Protocol Status ( sc-status )
   - User Agent ( cs(User-Agent) )
   - Cookie ( cs(Cookie) )
   - Referer ( cs(Referer) )
   - Time Taken (time-taken)

• Click OK on the WC3 Logging Fields windows
• Click Apply in the Actions Menu (on the Top right hand side of the IIS Manager)

NOTE: If you enable this logging during the day MessageStats will not pick up the logs for that day as it is an incomplete log, and MessageStats will only pick up yesterdays logs so you will start seeing data two days after you enable the logging on all of your Client Access Servers.

For additional information please see the OWA Report Pack User Guide.