Give the Service Account Client Ownership permissions over each of the Public Folders to be synchronized as follows:
| 1. | Open Exchange System Manager. |
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Note Your view may differ if you do not have Display administrative groups selected in your Organization Properties. |
Exchange System Manager
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| 2. | Expand Administrative Groups > First Administrative Group > Folders > Public Folders. Find the first folder, right-click on it and select Properties. |
Per-user Information (General Tab)

| 3. | Uncheck Maintain per-user read and unread information for this folder. |
Public Folder Permissions
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| 4. | Select the Permissions tab and click Client permissions. |
Public Folder Client Permissions
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| 5. | Click Add… and add the Service Account. |
| 6. | Highlight the Service Account by clicking on it. Select Owner from the Roles drop-down. |
| 7. | Make sure all checkboxes are selected, including Folder Contact. |
| 8. | Click OK. |
Repeat this process for each Public Folder.