If an attacker gets admin control over the on-premises Exchange server, they can forge authentication tokens or make API ...

The security problem affects organizations with a hybrid Exchange environment, running applications in both on-premises ...

Microsoft has warned customers to mitigate a high-severity vulnerability in Exchange Server hybrid deployments that could ...

Microsoft has urged its customers to be on high alert after discovering a dangerous vulnerability in hybrid Exchange ...

A Microsoft 365 outage is preventing Exchange Online users from sending and receiving emails, with messages being stuck in transit and not reaching the recipients' inboxes.

To exploit the vulnerability, an attacker has to first gain administrative access to an on-premises Exchange server. From ...

Microsoft 365 Outage Impacts Teams and Exchange Online If you’re having trouble jumping in a meeting with your colleagues this morning, you aren’t alone, as Microsoft 365 is reportedly ...

Microsoft Office is well on its way to realizing its “Mobile-First, Cloud-First” vision for its Office 365 offering, designed to make businesses more productive and collaborative than ever before by ...

Microsoft gave the example of trying to assign an Exchange Online Plan 2 license to an existing Microsoft 365 Business Standard licensee (who already has Exchange Online access capabilities).

These changes will apply to Microsoft 365 and Exchange Online environments. Outlook, Teams, EWS in Exchange Server, and other Microsoft products will continue to work as before.

A number of Office 365/Exchange Online users worldwide can neither get nor receive mail. Written by Mary Jo Foley, Senior Contributing Editor July 15, 2015 at 4:36 p.m. PT ...

Microsoft recently began deploying HTTP/3 across Exchange Online front-door servers. Microsoft 365 customers can expect latency reductions of up to 67% when using services like Outlook.