Like most Exchange fellows, I maintain a set of (offline) tools and scripts to analyze, design and deploy Exchange environments or setup or troubleshoot Exchange Online deployments. These tools are additional to the original media, service packs etc.
Because of the variety in customer environments, i.e. Exchange versions, the set contains tools for different versions of Exchange (when applicable), or versions of tools.
I’ve divided the toolkit in three parts:
EighTwOne (821) 
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Nice post-great summary!
@DanErelis
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This is a superb listing my friend. Thanks much!
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Thank you
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very informative in a simple and clear presentation! Thanks!
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Awesome!!!!
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Fantastic …:)
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In the same area as EWS Editor, I like EAS Tester: http://eastester.codeplex.com/
I’ve used it (and EWS Editor) to remove possibilities for a behavior I’ve seen and was trying deduce where it was coming from client access wise.
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