Hi Robin,

Could you tell me what the OS is on your machine?

In my opinion, it is not a good idea to grant NETWORK SERVICE read/write
permissions on the directory the user wants to save to, because it will
break the access security.

I think the simplest way is to use the try...catch structure to catch the
exception when the user attemps to save the file to a directory that he
doesn't has the corresponding permission.

Hope this helps.

Sincerely,
Linda Liu
Microsoft Online Community Support

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