We are having clients report they are receiving a message stating "There is not enough space on the disk" when uploading attachments to send via OWA. We had a data drive on one of our mailbox server's fill up due to excess log entries. Rather than wonder if that was the cause, I would like to know exactly where OWA places the uploaded file that is attached and then sent with the message? I do not believe this has anything to do with message size or sending/receiving size limitations.We are running Exchange server 2007 SP1 and OWA proxied via ISA servers on Windows 2003 servers.

OWA 2007 caches attachments/Web Ready documentsfor security reasons. There a conversiondirectory and cache size that can modified however:http://technet.microsoft.com/en-us/library/bb852213.aspxHow to Configure WebReady Document ViewingMore info:http://msexchangeteam.com/archive/2007/03/23/437257.aspxOverview of Exchange 2007 Outlook Web Access WebReady Document Viewing http://msexchangeteam.com/archive/2006/11/14/431477.aspxControlling attachment size in Exchange Server 2007 Outlook Web Access http://technet.microsoft.com/en-us/library/bb885048.aspxCaching in Outlook Web Access