Friday, July 11, 2014

To find out which domain controller you are authenticated to on ther server ?

I was helping my friend in finance to check out some issue in test environment, and of course, which starts as "hey, we got some database issue since we can't connect to to backend...". Great pick up line as usual.

So my friend shows me his database issue, and I can point it out straightaway that it is an authentication plus DNS issue rather than database. It rings the bell that my OP team friend told me about a project that they are looking at upgrading the domain controllers and it is reasonable that they are doing a rehearsal for the big date.

There is 2 active directory servers online and I am not sure which one the application server is authenticated from. Well, I found the following handy environment variable for just the job:

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