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Created 15 Jul 2005
Modified 16 Oct 2009

Article 2556

Microsoft ISA 2004 and Access denied


When connecting through a Microsoft ISA 2004 server, the FTP client has read only access to files and folders. Uploading, renaming, or deleting a file or folder is not possible. The FTP server replies with the following error: 

550 Access denied.


Microsoft ISA 2004 server (acts as Firewall) default settings only allow read access (list and download).

To change these settings open ISA management -> Select Firewall policy -> Web Access -> Protocol -> Filtering ->Configure FTP. On this page remove the check mark from the "Read Only" option.

Applies To
Microsoft ISA 2004

FTP Client Access from an ISA Server Network

isa, server