The most common cause of this failure is a file-based AV product that hasn't been told to ignore the ISA cache folder. Short of that, start looking in the system event log for disk errors. -----Original Message----- From: isapros-bounce@xxxxxxxxxxxxx [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Amy Babinchak Sent: Tuesday, July 10, 2007 9:52 AM To: isapros@xxxxxxxxxxxxx Subject: [isapros] Cache Error : ISA Server was unable to write content to the cache file. The failure is due to error: Unspecified error I'm getting this error every couple of days on an ISA 2006 server. I didn't find anything in the KB. Anyone point me toward the solution? Thanks, Amy -- ExchangeDefender Message Security: Click below to verify authenticity http://www.exchangedefender.com/verify.asp?id=l6AGg8eR029622&from=amy@ha rborcomputerservices.net All mail to and from this domain is GFI-scanned.