Microsoft 365 email security
Microsoft 365 filters a lot. It was not built for the email that reads like your finance director, arrives from a real supplier's hacked mailbox, and asks for one small change to the bank details. That is the email that gets through. That is the one that costs.
Sits alongside Microsoft 365.
Catches what it misses.
Connected by API. Your MX records stay exactly where they are. Live in an afternoon.
A message from "the MD" asking finance for something new, on a new thread, at 5pm. Held and flagged to the recipient, with the reason.
Bank detail changes and new payees flagged to the recipient before they act. Especially when the sender is real.
The link was clean when it arrived. It wasn't when someone opened it three days later. Checked again, then.
What was held, why, and who was targeted. Exportable when the insurer or the board asks. Nobody rebuilds a spreadsheet.
Keep Microsoft 365.
Close the gap.
Legacy authentication left on. A forwarding rule nobody set. Guest access from a project that ended in 2023. TrustLayer Posture checks the settings the attacker checks, flags drift the day it happens, and keeps the evidence current.
TrustLayer Users covers phishing, passwords, data handling and safe AI use, in short courses people finish. Simulations that look like this year.
Things people ask before they switch it on.
Keep it. Mail sits alongside and catches the impersonation and supplier-fraud cases that pass sender checks. The AI Health Check will show you exactly what got through last quarter.
Mail connects by API, so it can run alongside without touching your MX or your contract. Compare the two on your own traffic, then decide at renewal.
No. It reads the mailbox via API after delivery and acts in seconds. Nothing queues.
The recipient sees a plain-English banner with the reason. Admins see it in the platform. Nothing is silently deleted.
An export: what was held, why, who was targeted, and the training record if you also run Users. The questionnaire answers itself.
Sold through partners.
Switched on in a morning.
Same account team. Same invoice. Mail added as a line.
Talk to BT about TrustLayer →One platform for every customer. Deal registration and a AI Health Check to open the door.
Partner programme ↗Tell us where you are and roughly how many people. We'll introduce you to one that fits.
Find a partner →Already paying for Mimecast or Proofpoint on top of Microsoft 365? Both comparisons set out what each one adds and what it costs you to keep.