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Event ID: 9402 Source: MSExchangeSA

Source
Level
Description
OALGen failed to read the objectGuid attribute from offline address book (OAB) object '/o=Domain/cn=addrlists/cn=oabs/cn=Default Offline Address Book' in Active Direcotry. Please check security settings on this object. OAB generation will not be performed.
Comments
 
From a support forum:

Using ADSIEdit:

1. Navigate to the ‘Default Global Address List’ object

CN=Default Global Address List, CN=All Global Address Lists, CN=Address Lists Container, CN=First Organization, CN=Microsoft Exchange, CN=Services, CN=Configuration, DC=Domain, DC=local

2. Go to the properties of the ‘Default Global Address List’ object
3. Copy the distinguishedName attribute of the ‘Default Global Address List’.

It should look similar to the one below.

CN=Default Global Address List, CN=All Global Address Lists, CN=Address Lists Container, CN=First Organization, CN=Microsoft Exchange, CN=Services, CN=Configuration, DC=Domain, DC=local

4. Navigate to the ‘Microsoft Exchange’ container.
CN=Microsoft Exchange, CN=Services, CN=Configuration, DC=Domain, DC=local

5. Go to properties of the ‘Microsoft Exchange’ container
6. Select the GlobalAddressList attribute and click Edit.
7. Paste in the distinguishedName attribute of the ‘Default Global Address List’ and click Add

8. Click OK twice to close out of the properties.
9. Replicate domain controllers
10. Rebuild the OAB again

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