Event ID - 9157

Event Id9157
SourceCDOEXM
DescriptionMicrosoft Exchange System Attendant does not have sufficient rights to read Exchange configuration objectsin Active Directory. Wait for replication to complete and then check to make sure the computer account is a memberof the "Exchange Domain Servers" security group.
Event InformationAccording to Microsoft:
Explanation :

See the message text for the event.
User Action :
No user action may be required because Exchange will make additional attempts to read Exchange configuration objects during the replication process.
If this event occurs after all domain controller replication has occurred, ensure that the required permissions have been assigned to the Exchange Domain Servers group for this domain. To ensure that the required permissions are configured, run Exchange setup again and select Reinstall. Running setup again will set permissions on the necessary Active Directory objects on a nearby domain controller, and those permissions will then be replicated to other domain controllers.
You can also manually ensure that the required permissions have been configured. To do this, ensure that the Exchange server is a member of the Exchange Domain Servers group of its domain using the Active Directory Users and Computers snap-in. You must also use the Active Directory Service Interfaces (ADSI) Edit snap-in to ensure that the Exchange Domain Servers group of this domain is assigned Full Control permissions on the Configuration/Services/Microsoft Exchange object.
Reference LinksEvent id 9157 from Source CDOEXM

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