Symptom:

Event Logs with repeated entries…

Log Name: Application
Source: MSCRMAsyncService
Date: 11/15/2021 01:55:49 AM
Event ID: 25349
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: CRM02.kimconnect.com
Description:
Async backlog is detected in the Queue: AsyncOperation for organization. OrganizationId: {SomeID} Sample 1: Number of Jobs Backlogged: 1, Max Latency Observed: 25847 seconds Sample 2: Number of Jobs Backlogged: 1, Max Latency Observed: 26748 seconds Sample 3: Number of Jobs Backlogged: 1, Max Latency Observed: 27648 seconds Sample 4: Number of Jobs Backlogged: 1, Max Latency Observed: 28548 seconds
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="MSCRMAsyncService" />
<EventID Qualifiers="49152">25349</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2021-11-16T01:55:49.056151900Z" />
<EventRecordID>102675119</EventRecordID>
<Channel>Application</Channel>
<Computer>CRM02.kimconnect.com</Computer>
<Security />
</System>
<EventData>
<Data>AsyncOperation</Data>
<Data>SOMEID</Data>
<Data>1</Data>
<Data>25847</Data>
<Data>1</Data>
<Data>26748</Data>
<Data>1</Data>
<Data>27648</Data>
<Data>1</Data>
<Data>28548</Data>
</EventData>
</Event>
Resolution:

Option A: Update the status of all the emails with a status of ‘Pending Send’ to ‘Cancelled’
Option B: Ensure that the email router account is valid and sending emails smoothly
Option C: Reboot Frontend (Web Tier) and Backend (SQL, Async) servers

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