Sophos for Microsoft SharePoint: scanning times out with error

Issue
When attempting to upload or download a document, scanning times out and the browser displays an error message. It does not specify that timeout has occurred.

You may see one of the following messages:

• In the Virus Found window:

The installed virus scanner is currently unavailable. If the problem persists, contact your administrator.

• You may see an error in the Error window:

Exception from HRESULT: 0x80041054

This can occur if you have configured a short timeout duration in the settings for On-access|Anti-Virus Settings|Timeout duration, especially if you are trying to download a large document.

Sophos product and version
Sophos for Microsoft SharePoint

What to do

Increasing the 'Timeout duration' setting may prevent this.