Disable thumbnail synchronization for all users

Image thumbnails synchronize every 30 minutes as the IXIA CCMS default. If this presents your deployment with issues, you can disable thumbnail synchronization for all users, regardless of their personal settings.

When thumbnails are created, they get stored on the server and become available to all users after the next thumbnail synchronization. For a deployment with very large Content Store, thumbnails can use lots of space. In such cases, disabling synchronization can improve latency.

Important: Make configuration changes in a test environment and confirm they work before copying them to a production environment.

To disable thumbnail synchronization for all users:

In the TEXTML Administration perspective, connect to your server.
Locate the multiimage.xml file in the repository's /system/conf collection.
Check out the file and open it for editing.
Locate the <thumbnails> element and set the allowThumbnailSynchronization attribute to false.
For example:
```
...

<thumbnails defaultscale="0.5" minsize="150" maxsize="600" allowThumbnailSynchronization="false"/>
...
```
Note: If the attribute is not there, add it and edit the multiimage.dtd file.
This attribute disables thumbnail synchronization, regardless of the users' personal settings. When <allowThumbnailSynchronization> is set to false, the Synchronize Image Thumbnails option in the Synchronization Preferences is dimmed and the following message displays:
```
[disabled by system administrator]
```
Save, close, and check in the file.
Inform users of the changes.
The changes will be applied automatically once users close and then reopen their IXIA CCMS Desktop. Users can also apply the changes without restarting their CCMS Desktop by clicking IXIA CCMS > Synchronize Configuration.

Image thumbnail synchronization is disabled for all users.