The report-parameter values can be any of the following:

• 123 => a single parameter
• 123(1) => a single parameter with options defined
• 123(idx|1) => a column parameter with a row index or filter (can have * and ? wildcards)

The options indicate which trend types to include and are a combination of these:

• 0 = no options
• 1 = average
• 2 = min
• 4 = max
• 8 = show real time next to avg

As an example, 107(SL*|7) would include the avg/min/max of all SL* cells from column 107 ( 7 = 1 (avg) + 2 (min) + 4 (max))

Whether the options are supported depends on the components being used in the mail report.

For accessing the report URL remotely, there's no URL options available to include username/password. If the library through which the URL is being requested supports Windows Authentication, I believe you should probably be able to make the request work by passing in authentication details to that library (such as here), but it's not something I've seen used before.