In version 10.1 the ability to prevent users from adding attachments to Service Desk queues was added. Starting in this release, appliance administrators can specify ticket attachments restrictions, as applicable. These restrictions can be configured through the Queue Detail page Service Desk | Configuration | Queues | Name of Queue.
解决办法
To edit the attachment restrictions:
Go to Service Desk | Configuration | Queues
Click on the name of the queue desired
Scroll down to Ticket Attachment Restrictions
Choose the desired setting:
None - Default setting - Allow users to add any types of files as attachments
Allow images only - Allow only image files to be added as attachments
Custom - Specify file extensions that administrators want to allow as attachments
Comma separated list of allowed file extensions
Allow files with no extensions - Administrators can also allow all files without extensions
Prevent all attachments - Disable users from adding any file attachments