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RudolfAmarlapudi-2729 asked ZhengqiLou-MSFT commented

Multiple users' Global Address List not current.

Hello,

We are running Exchange 2016 (CU16).

Users are reporting that their GAL is not current, and not reflecting additions and removals in Exchange.

I tested with a user by creating a profile with cached mode disabled. This one lists the GAL correctly. I suspect this is not an Outlook client (corrupt OAB), since it appears to be impacting everyone that the customer indicates.

When attempting to Download Address Book, I receive:
"Task 'Email.com" reported error (0x8004010F) : 'The operation failed. An object cannot be found.'


Would it be the right solution to recreate the default OAB? If so, could you please furnish the appropriate steps?

Thanks in advance,
Rudy

office-exchange-server-administration
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RudolfAmarlapudi-2729 answered ZhengqiLou-MSFT commented

Issue was related to Outlook and an odd configuration that the customer had. They have on-prem Exchange, but had also created an Office 365 account. Looks like AutoDiscover was making Outlook "talk" to a cloud account.

HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\Outlook\AutoDiscover
DWORD (32-bit Value): ExcludeExplicitO365Endpoint
Value: 1

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Hi @RudolfAmarlapudi-2729 ,

Very happy to know that you have resolved this issue, and thank you for sharing how you fixed it.

Have a nice day!

Cheers,
Lou

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ZhengqiLou-MSFT answered RudolfAmarlapudi-2729 commented

Hi @RudolfAmarlapudi-2729 ,

I won't say that recreating the default OAB will 100% fix this but it still worth a try.
But before that, you could try to set the organization to accept any download request with:

 Set-OfflineAddressBook -Identity "Default Offline Address Book" -VirtualDirectories $null -GlobalWebDistributionEnabled $true

If that fails, then create a new OAB/update it and assign the OAB to the database with the following cmdlets:

 New-OfflineAddressBook -Name "OAB" -AddressLists "Default Global Address List" -GlobalWebDistributionEnabled $true
 Get-OfflineAddressBook | Update-OfflineAddressBook
 Set-MailboxDatabase -Identity "MBXDatabase" -OfflineAddressBook "OAB"

If it still has no luck, use this to test the services:

 Test-OutlookWebServices -identity:UserName -MailboxCredential (Get-Credential) | FL

In addition, someone fixed it by deleting all outlook profiles & data files and all the files in c:\users\usernameAppData\Local\Microsoft\Outlook.

Best regards,
Lou


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Hi @RudolfAmarlapudi-2729 ,
Do suggestions above help? Please feel free to let me know if you need further help.



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Hi @RudolfAmarlapudi-2729 ,
I am writing here to confirm with you how thing going now?



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Hello - I'm checking a possible solution, and will update once confirmed.

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