By default, when users click Send/Receive or press F9 for Cached Exchange Mode accounts, Outlook synchronizes with the Exchange server. When this setting is enabled, clicking Send/Receive and pressing F9 do not synchronize with Exchange unless only one folder is being synchronized. Users can continue to use shift-F9 to synchronize the current folder.
| Registry Hive | HKEY_CURRENT_USER |
| Registry Path | software\policies\microsoft\office\15.0\outlook\cached mode |
| Value Name | nomanualonlinesync |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |