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Installation > Security Considerations

Security Considerations

ExcelWriter executes in one of the following user contexts:

The NETWORK SERVICE account (IIS6)
The ASPNET account (IIS5)
The authenticated user account
The impersonated user account (when impersonation is turned on)

When an ExcelWriter application opens an existing spreadsheet - either using ExcelTemplate or ExcelApplication.Open - the application's security context (NETWORK SERVICE, ASPNET, authenticated user, or impersonated user) must have Read access to this spreadsheet.

If you want to save a generated Excel file on the server (rather than stream it to the browser), the NETWORK SERVICE account, the ASPNET account, authenticated user, or impersonated user must have Write access to the directory in which the file will be saved.

For more information on ASP.NET security, see Authentication in ASP.NET: .NET Security Guidance.