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As the titles states, how often should I perform an autodiscover query against Exchange? This is for a project in C# that is using Exchange Web Services (EWS).

Surprisingly enough, I can't seem to find an answer that says you should perform this every n hour, or something along those lines.

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That really depends on what you're doing, why you're doing it, and what constraints you have... doesn't it?

That said, since 2007, the default autodiscovery interval for Outlook clients is an hour.

I'd start there and adjust as needed.

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