Fix Microsoft Exchange Offline Address Book (OAB) 0x80190194 Error

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Run this command from the Exchange Management Shell to find the arbitration mailbox responsible for generating the offline address book:
Run the following command or restart the Microsoft Mailbox Exchange Assistant service on the server to force an OAB update:

Run the Windows Update troubleshooter.
Restart the background communication service.
Download from the Microsoft Update Catalog.
Use the Windows 10 Upgrade Assistant.
Download the ISO manually.
Choose the best internet connection.
Rename the Outlook folder.
Create a new profile.

In Outlook, click File > Account Settings > Download Address Book. In the Offline Address Book dialog box that appears, set the following options: Download the following changes since the last send/receive: This check box is selected by default. If you clear the check box, the offline address book will download completely.


If you are looking for a simple solution to fix this Windows 0x80190194 error, then you are in the right place because I intend to make everything as simple as possible for you. In this article, I would like to discuss in detail what error is 0x80190194, how it occurs, and the different symptoms associated with it, and most importantly, how you can correct it.

0x80190194 Error

Recently, there was a problem where users could not download the address book offline with an Outlook version. The error reported by the user is the error reported by the task ‘Email’ (0x80190194) :’The operation failed.

The first thing I think you should check is if you have similar problems.

Check the application logs to see if anything is related to the same problem:

  • Find out which database the users are in (problem users) and check the database of the PF folder (point it to the correct server).
  • Can you create another offline address book, replicate it and use this new address book on this database to see if it solves the problem?
  • Go to the OAB properties, make sure that versions 2 and 3 are enabled, that public folder distribution is enabled and that the correct PF server is included.

Running a virus scan

If all the above methods do not solve the error 0x80190194, you may face a possible virus or malware that is the main cause of the error. To check whether this is the case or not, I recommend that you perform a complete antivirus scan of your system.

Use ADSIEdit


  1. Open ADSIEdit on the Exchange Server
  2. Choose Connect to
  3. In the connection settings in the Select a well know Naming Context choose Configuration
  4. Navigate to CN=Address-Templates,CN=Addressing,CN=Organisation,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=domain,DC=local
  5. Check if there are any strings with “\0ACNF:<GUID>”
  6. ADSIEdit strings with “\0ACNF:”
  7. Delete strings identified in previous step
  8. Open Exchange Power Shell and type: Update-OfflineAddressBook –Identity <Identity>
  9. Check Send/Receive finish successfully on client machine

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Re-enable Arbitration and Discovery Mailboxes

Arbitration and Discovery Mailboxes

Then re-enabled the arbitration and discovery mailboxes using these commands

  • Enable-Mailbox -Arbitration “SystemMailbox {bb558c35-97f1-4cb9-8ff7-d53741dc928c}”
  • Enable-Mailbox -Arbitration “SystemMailbox {1f05a927-xxxx- xxxx – xxxx -xxxxxxxxxxxx}”
  • Enable-Mailbox -Arbitration “SystemMailbox {e0dc1c29-89c3-4034-b678-e6c29d823ed9}”
  • Enable-Mailbox -Arbitration “FederatedEmail.4c1f4d8b-8179-4148-93bf-00a95fa1e042”
  • Enable-Mailbox -Arbitration “Migration.8f3e7716-2011-43e4-96b1-aba62d229136”
  • Enable-Mailbox -Discovery “DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}”

Replace xxxx in the system mailbox, starting with 1f05, with the one created in your AD, because it is unique. The others must be identical to the above command.

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