<div>
Exchange version and SP or CU?
</div>


<div>
I Created new Throttling policy with MaxRCAConcurrency=3000 instead of $NULL and issue has been resolved.
</div>


I Created new Throttling policy with MaxRCAConcurrency=3000 instead of $NULL and issue has been resolved.

<div>
<div class="content wysiwyg-content">
CAS server shows below error message.<br />
<br />
Process Microsoft.Exchange.RpcClie<wbr />ntAccess.S<wbr />ervice.exe<wbr /> (PID=2900). User 'Sid~AJES\es1admin~RCA~fal<wbr />se' has gone over budget '582' times for component 'RCA' within a one minute period. Info: 'Policy:Es1policy1, Parts:CAS:581;'. Threshold value: '100'.
</div>
</div>


CAS server shows below error message.

Process Microsoft.Exchange.RpcClientAccess.Service.exe (PID=2900). User 'Sid~AJES\es1admin~RCA~false' has gone over budget '582' times for component 'RCA' within a one minute period. Info: 'Policy:Es1policy1, Parts:CAS:581;'. Threshold value: '100'.

EMC SourceOne-Email Archive activity failed due to RCAMaxConcurrency threshold issue.

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.