Error code 0x80070057 when trying to connect to the exchange sever

When using 2010 to do name discovery I am getting "An unknown error occurred, error code:0x80070057" it stops and no connection to the exchange server is name.

does anyone have any suggestions?
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More about error code 0x80070057 connect exchange sever
  1. When using 2010?

    Outlook 2010?

    If so:

    Have you tried deleteing the current MAPI profile and .OST file, and recreating them?
  2. Yes i have.
    Yes it's Outlook 2010
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