A malicious component dubbed HollowGraph uses the calendar feature in compromised Microsoft 365 mailboxes as a command-and-control channel to receive attacker commands and exfiltrate stolen data.

DavMail 7.0.0 turns on Graph delta sync by default, drops the caldavImpersonate setting, and now locks down its token file on Linux machines.

Microsoft begins a 12-month retirement of Windows PowerShell 5.x support for Graph PowerShell as development shifts to PowerShell 7.x.

Nation-state espionage operations are increasingly using native Microsoft services to host their command-and-control (C2) needs. A number of unrelated groups in recent years have all come to the same ...

Microsoft was not releasing feature updates for Exchange Web Services in Exchange Online and now says it will block EWS ...