Exchange connectors

Microsoft Exchange Online can route outbound mail through an on-premises server or a hosted service (sometimes called “smart hosting”). This enables organizations to deliver email to business partners through private networks, use data loss prevention (DLP) appliances, and perform custom post-processing of outbound email. Exchange Online also supports Address Rewrite, in which outbound email is routed through an on-premises gateway that modifies the addresses. This feature enables organizations to hide sub-domains, make email from a multi-domain organization appear as a single domain, or make partner-relayed email appear as if it were sent from inside the organization. Administrators configure custom email routing within the Exchange admin center (EAC).


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EOP/TLS Encryption

Office 365 Message Encryption is an easy-to-use service that lets email users send encrypted messages to people inside or outside their organization. Designated recipients can easily view their encrypted messages and return encrypted replies. Regardless of the destination email service—whether it’s, Yahoo, Gmail, or another service—email users can send confidential business communications with an added level of protection against unauthorized access.

There are many scenarios in which email message encryption might be required, including:

  • A bank employee sending credit card statements to customers
  • An insurance company representative providing policy details to customers
  • A mortgage broker requesting financial information from a customer for a loan application
  • A health care provider sending health care information to patients
  • An attorney sending confidential information to a customer or another attorney
  • A consultant sending a contract to a customer

Exchange Online and Exchange Online Protection (EOP) administrators set up Office 365 Message Encryption by defining encryption rules. ComStat engineers can help customers with subscribed support service customize encrypted messages with organizational text and logo, presenting a company brand that’s familiar to message recipients.

Additionally, Exchange provides advanced services for high level encryption services like certificated TLS etc. The diagram below showing the workflow through which Office 365 Message Encryption protects encrypted emails from being read by unauthorized users, while allowing straightforward access by authorized recipients.

encrytpion workflow

Exchange Online Protection – EOP

Microsoft Exchange Online Protection (EOP) is a cloud-based email filtering service that helps protect Exchange users against spam and malware. EOP includes tools to safeguard organizations from messaging-policy violations. EOP runs within Microsoft data centres as a bundled provision for licensed Office 365 and Exchange users reducing problematic customer bandwidth risks, protecting email before delivery to all user devices, and simplifying the management of on-premise messaging environments and alleviating inherent costs that come with maintaining conventional on-premises hardware and software.

Microsoft Exchange EOP Features:

  • Eliminates threats before they reach your business firewall with multi-layered, real-time anti-spam and multi-engine anti-malware protection.
  • No extra hardware or software installation – EOP is a bundled service and runs from data centre, managing email before it is delivered to user devices.
  • Protects your company’s IP reputation by using separate outbound delivery pools for high-risk email.
  • Provides 5 financially backed SLAs, including protection from 100% of known viruses and 99% of spam.
  • Active content, connection, and flexible policy-based filtering enables compliance with corporate policies and public sector/IT departmental governance.
  • Leverages a globally load-balanced network of data centres helps to ensure a 99.999% network uptime.
  • Managed and administered from the Exchange Administration Centre with a single web-based interface.
  • Near real-time reporting and message trace capabilities provide insight into email environments by retrieving the status of any message that Exchange Online Protection processes.
  • Available to non-Exchange users.




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