Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Being unable to open files as usual is one of the most frustrating ...

Microsoft is working to resolve a known issue that prevents some users from opening Excel email attachments in the new Outlook client.

Did you receive an RBF file and are unable to open it? That’s a common issue if you have not used such file extensions previously. The RBF format stands for Rollback File, used primarily by the ...