If Excel Online is not working and you see errors Couldn't Open the Workbook, or Request Was Taking Too Long, then see this post for the fix.

XLS files sent via emails appear password protected but aren’t, opening automatically to install malware from compromised macros, according to researchers. Hackers have updated the age-old Excel ...

CyberArk has created an online version of 'White Phoenix,' an open-source ransomware decryptor targeting operations using intermittent encryption.