exchangewebservices - How to interpret EwsCutoffBalance in an Exchange throttling policy? -

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i try figure out how throttling policies affect ews.

for ews, have these values:

  • ewsmaxsubscription: number of active subscriptions done impersonated user.
  • ewsmaxconcurrency: how many concurrent connections or actions single client may take.
  • ewsmaxburst: how far above standard resource limit client may go in shorts bursts (in milliseconds). comes effect when percentage of cpu/memory usage exchange exceeds defined threshold (depending of setup, suppose).
  • ewsrechargerate: speed @ user’s resource budget recharges or refills (in milliseconds).

i understand each of above throttling parameters. however, i'm not sure understand ewscutoffbalance. parameter defines resource consumption limits ews user before user blocked performing operations on specific component...

my questions...

  1. how value used regarding ewsmaxburst , ewsrechargerate values?
  2. what unit of parameter?
  3. how can determine right value if need change throttling policy of specific user account (instead of using "unlimited")?

both ewsmaxburst , ewsrechargerate expressed in ms. default, client blocked after 5 minutes (300000 / 1000ms /60s) heavy usage. when recharge rate 900000 default, system recharge in 15 minutes. if keep client requests processed, can either increase maxburst on recharge rate or decrease recharge rate less maxburst


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