Event ID - 8213

Event Id8213
SourceMSExchangeFBPublish
DescriptionSystem Attendant Service failed to create session for virtual machine %1. The error number is %2.
Event InformationExplanation :
The System Attendant service failed to create a session for the virtual machine specified in the Event Log.
This usually occurs when the Exchange Service Account credentials have been changed or corrupted. 

User Action :
Retyping the Exchange Service Account password in the Exchange System Manager usually fixes this.

According to Microsoft:
CAUSE :

This behavior may occur if the msExchEncryptedPassword attribute on the Administrative Group (AG) object of the Exchange server is corrupted. Additionally, this problem occurs in an environment that uses an Exchange server that uses the Active Directory Connecter (ADC).
RESOLUTION :
To resolve this behavior, verify the Exchange service account and the password. To do this, follow these steps:
1. Click Start, point to Programs, point to Microsoft Exchange, and then click System Manager.
2. Expand Administrative Groups.
3. Right-click the administrative group that contains your Exchange Server 2000 computers, and then click Properties.
4. Click the General tab, click Modify, and then make sure that you type the correct password for the AG in the Password box.
5. Click OK.
Reference Links Event 8213 Appears in Exchange 2000 Server Event Viewer

Event ID 8213 and Event ID 9152 are logged by Exchange 2000 Server

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