In theory, a threat actor could impersonate someone, invite the victim for a Teams chat, and have them open a phishing link, ...

To safeguard against this line of attack, organizations are recommended to restrict B2B collaboration settings to only allow ...

Accepting a Teams guest invitation can drop users into an unprotected tenant, bypassing all Defender for Office 365 controls.

A new report from Ontinue is raising major concerns about how Microsoft Teams handles cross-tenant collaboration.