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Event ID: 2915 Source: MSExchangeADAccess

Level
Description
Process Microsoft.Exchange.RpcClientAccess.Service.exe (PID=2584). The user 'user_name ~ Sid \ User ~ RCA ~ false' read the value '159 'times for component' RCA 'in a period of one minute. Information: 'Policy: DefaultThrottlingPolicy_abce001f-56bf-47a7-B217-a2d1494d542e, Setting: MaxConcurrency: 158;'. Value threshold: '100 '.
Comments
 
A suggestion for this event from a support forum was to change the value of the RCAMaxConcurrency to $null for the Default Throttling Policy. A value of 30 will not be enough because your user value is '159'  There is no issue with having this value set to $null.

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