User!UserID when using custom Authentication in SSRS2012

Question

We are using FormsAuthentication with SSRS2012 for our custom authentication in SSRS2012.
What SSRS code determines User!UserID report expressionwhen using a custom authentication provider?
I ask this because if the FormsAuthCookie.UserName determines the User!UserID value, then I need to use a more unique value than FirstName/LastName when building the forms auth cookie.
thanks
scott

Answer 1

Hi scott,
UserID is the ID of the user running the report. If you are using Windows Authentication, this value is the domain account of the current user(Domain/username).
The value of User!UserID is determined by the Reporting Services security extension, which enables the authentication and authorization of users or groups; that is, it enables different users to log on to a report server and, based on their identities,
perform different tasks or operations.
By default, Reporting Services uses a Windows-based authentication extension, which uses Windows account protocols to verify the identities of users who claim to have accounts on the system. Reporting Services uses a role-based security system to authorize
users. The Reporting Services role-based security model is similar to the role-based security models of other technologies.
WorkFlow about authentication and authorization occur as follows:
https://msdn.microsoft.com/en-us/library/ms152825.aspx
The user credentials are submitted to the Reporting Services Web service through the
LogonUser method.
This member of the Reporting Services Web service can be used to pass user credentials to a report server for validation. Your underlying security extension implements
IAuthenticationExtension.LogonUser which contains your custom authentication code. In the Forms Authentication sample,
LogonUser, which performs an authentication check against the supplied credentials and a custom user store in a database. An example of an implementation of
LogonUser looks like this:
https://msdn.microsoft.com/en-us/library/ms152899.aspx
If you still have any problem, please feel free to ask.
Regards
Vicky Liu
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