I am currently involved in the planning of a proposal to migrate to Office 365 E1.
We currently use MessageLabs/Symantec.cloud (http://www.symantec.com/en/uk/products-solutions/families/?fid=symantec-cloud) to filter spam, vet content and manage TLS connections - specifically the following services:
- MessageLabs Image Control
- MessageLabs Content Control
- MessageLabs Content TLS
- MessageLabs Anti-Virus
- MessageLabs Anti-Spam
Can anyone confirm that all of the above are handled by one or more of the features provided by Office 365 E1?