At the moment our company is in a multi-vendor security security profile using O365 E3 + EMS E3 from the Microsoft portfolio. Discussions are on-going with multiple vendors for an EDR solution and M365 Defender for Endpoints is being considered as an option. However, looking into the licensing it seems like we might have to move our 500+ users from the current licensing plan to M365 E3 + M365 E5 Security Add-on? Initially it was said by a partner that an EMS E5 plan would suffice but I don't think that's the case. Any advice is much appreciated.