diff --git a/egw-pear/HTTP/WebDAV/Server.php b/egw-pear/HTTP/WebDAV/Server.php
index 7a58379b6d..60dc31ac92 100644
--- a/egw-pear/HTTP/WebDAV/Server.php
+++ b/egw-pear/HTTP/WebDAV/Server.php
@@ -1217,6 +1217,10 @@ class HTTP_WebDAV_Server
                     $options["content_language"] = $val;
                     break;
 
+                case 'HTTP_CONTENT_LENGTH':
+                    // defined on IIS and has the same value as CONTENT_LENGTH
+                    break;
+
                 case 'HTTP_CONTENT_LOCATION': // RFC 2616 14.14
                     /* The meaning of the Content-Location header in PUT
                      or POST requests is undefined; servers are free
@@ -1244,6 +1248,10 @@ class HTTP_WebDAV_Server
                     // on implementations that do not support this ...
                     break;
 
+                case 'HTTP_CONTENT_TYPE':
+                    // defined on IIS and has the same value as CONTENT_TYPE
+                    break;
+
                 case 'HTTP_CONTENT_MD5':      // RFC 2616 14.15
                     // TODO: maybe we can just pretend here?
                     $this->http_status("501 not implemented");
@@ -2044,7 +2052,7 @@ class HTTP_WebDAV_Server
     {
 		//error_log( __METHOD__."\n" .print_r($text,true));
 		//error_log("prop-encode:" . print_r($this->_prop_encoding,true));
-            
+
 		switch (strtolower($this->_prop_encoding)) {
 			case "utf-8":
        			//error_log( __METHOD__."allready encoded\n" .print_r($text,true));