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The AuthPackage element specifies the authentication scheme that is used when authenticating against the Exchange server that has the Mailbox server role installed.
<AuthPackage>basic or kerb or kerbntlm or ntlm or certificate or negotiate or nego2</AuthPackage>
Attributes and elements
The following sections describe attributes, child elements, and parent elements.
Attributes
None.
Child elements
None.
Parent elements
| Element | Description |
|---|---|
| Protocol (POX) |
Contains the specifications for connecting a client to the Client Access server. |
Text value
The text value specifies the authentication scheme that is used when authenticating against the Mailbox server. The following are the possible values:
- basic
- kerb
- kerbntlm
- ntlm
- certificate
- negotiate
- nego2
Remarks
The AuthPackage element is only used when the Type (POX) element has a text value of EXCH or EXPR.
Version differences
Office 365, Exchange Online, and on-premises versions of Exchange starting with build 15.00.0995.014 return a value of "negotiate" only if the server is configured to use Negotiate authentication and the client includes a X-ClientCanHandle header that contains "Negotiate".