Forum Discussion
Exchange Online: Sudden mass quarantine of legitimate emails (tenant‑wide impact)
Hello, Since last Thursday , we have been experiencing a sudden and significant increase in quarantined emails across our Exchange Online tenant. Key observations: - Hundreds of legitimate e...
I haven't heard of anything yet but will keep an eye out. Has the DNS changed lately? That could be one reason, seen that before.
We are seeing the same. It is quite frustrating. No DNS or O365 email config changes.