Event ID - 9320

Event Id9320
SourceMSExchangeAdmin
Description"OALGen could not generate full details for some entries in the offline address list for address list %1. To see which entries are affected, event logging for the offline address list generator must be set to at least medium. - %2"
Event InformationAccording to Microsoft:
Cause:

This Warning event is logged when there are problems generating details for one or more entries in an offline address list. The most common cause for this event is when the details information of a user object is larger than the 64-kilobyte (KB) limit. This may occur when a user has many certificates. Because you cannot increase the 64-KB limit, the recommended solution is to remove any unnecessary certificates from the user object in Active Directory.
User Action :
To resolve event 9020, do both of the following:

1. Use Event Viewer to examine other events that provide more details about the cause of this Warning event. These additional events will disclose the offline address book that is affected. These additional events also indicate the user whose details information is larger than 64 KB. For more information, see the Explanation section earlier in this event.
2. Reduce the size of the details information of the user to be under the 64-KB limit. You can do this by removing unnecessary certificates from the users properties in Active Directory.
To remove certificates from a user
1. Open Active Directory Users and Computers.
2. Click View, and make sure that Advanced Features is selected.
3. Locate the user in question, right-click, and then click Properties.
4. Click the Published Certificates tab. This shows a list of X.509 certificates published for this user.
5. Remove any unnecessary certificates.
6. Click OK and close Active Directory Users and computers.
Reference LinksOALGen could not generate full details for some entries in the offline address list for address list %1

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