hai, try to access the web service directly without using that in a application. if you are able to invoke the method of you web service, then you can try the same in application. if you have any problem in accessing the service do the needed thing and try to do the same in application. if you are able to access the method directly and not by the application then check the security part of the web server where you have published it. you can do this easily.. cheers asithangae

There are several approaches to this issue. Extended Mapi or third party libraries that side step the security issues. Check out http://www.slipstick.com/outlook/esecup.htm[^] ............................. There's nothing like the sound of incoming rifle and mortar rounds to cure the blues. No matter how down you are, you take an active and immediate interest in life. Fiat justitia, et ruat cælum

thanks

if you want to convert it to byte array you have to serialize it. using System.Runtime.Serialization.Formatters.Binary; /*Note i suppose your object is serializable if not add [Serializable] attrubite to your object class*/ BinaryFormatter Serialize=new BinaryFormatter(); MemoryStream stream=new MemoryStream(); byte[]ObjectInBytes=Serialize.Serialize(stream,temp); //to Deserialize stream=new MemoryStream(ObjectInBytes); stream.Seek(0,SeekOrigin.Begin); temp=(TypeOfYourObject) Serialize.Deserialize(stream); marcoryos