| .osdx |
Search Connector Description File |
| .olb |
OLE Object Library |
| .oft |
Outlook File Template |
| .ops |
Office Profile Settings File |
| .oca |
Custom Control Library Type File |
| .odx |
BizTalk Server Orchestration File |
| .ofc |
Open Financial Connectivity File |
| .one |
OneNote Document |
| .onepkg |
Microsoft OneNote Package File |
| .oem |
OEM Setup File |
| .odc |
Office Data Connection File |
| .otm |
Outlook Macro File |
| .oss |
Microsoft Outlook Saved Search File |
| .onetoc2 |
Microsoft OneNote Table of Contents File |
| .olk14message |
Outlook Message File |
| .obd |
Office Binder Document |
| .ost |
Outlook Offline Data File |
| .oqy |
Excel OLAP Query File |
| .odl |
Object Description Language File |
| .olm |
Mac Outlook Database File |
| .officeui |
Microsoft Office UI Customization File |
| .olp |
Office Live Package |
| .opax |
Microsoft Office User Settings File |
| .olk |
Outlook Address Book File |