FireDAC Components for Excel Services

Build 20.0.7654

Auth Scheme

The scheme used for authentication. Accepted entries are NTLM, Basic, Digest, Forms, None, and Negotiate.


property AuthScheme: String;

Data Type


Default Value



Together with Password and User, this field is used to authenticate against the server. NTLM is the default option. Use the following options to select your authentication scheme:

  • NTLM: Set this to use your Windows credentials for authentication.
  • Basic: Set this to use HTTP Basic authentication.
  • Digest: Set this to HTTP Digest authentication.
  • Forms: Set this to use Forms authentication.
  • Negotiate: If AuthScheme is set to Negotiate, the component will Negotiate an authentication mechanism with the server. Set AuthScheme to Negotiate if you want to use Kerberos authentication.

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Build 20.0.7654