OABGen will skip user entry…SMTP address is invalid
Receiving an error message on your mailbox server…
Source: MSExchangeSA
Event ID: 9325, 9320, 9327
Message: OABGen will skip user entry ‘Display Name’ in address list ‘\Address List’ because SMPT address ‘’ is invalid.
This was happening on my server, however the names that were shown didn’t have mailboxes. This is how I fixed it.
- If using Windows 2008 Directory Services open Active Directory Users and Computers if not open ADSI (adsiedit.msc) and browse to the user in the error message.
- Browse the user’s attributes and go to ‘showInAddressBook’ attribute. This should be blank if the user does not have a mailbox. If it isn’t, remove any entry listed in here and click OK.
Update: I found out why this is even happening in the first place. Consider this scenario; You need to create a new user account that won’t be mail enabled. You copy an existing user that is mail enabled to create the new user account. The showInAddressBook attributes are copied from the existing mail enabled user over to the new non-mail enabled user, causing this issue.
Solution: Create a template user that is not mail enabled to create new users from.