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Decoding Centralized Mail Transport and Criteria-Based Routing in Exchange

Understanding Centralized Mail Transport and Criteria Based Routing in Exchange Online
As an Exchange Online cloud architect, you need to understand the concepts of centralized mail transport and criteria based routing in order to effectively manage and optimize your cloud messaging environment.

What is Centralized Mail Transport?
Centralized mail transport is a process in which all mail sent and received to and from your organization is managed by a single messaging system. This system is responsible for routing messages from one mailbox to another, as well as delivering messages from outside the organization to the appropriate mailbox.

In Exchange Online, this is accomplished through the use of a routing connector. This connector is responsible for taking messages that are sent to or from the organization and routing them to the correct mailbox, depending on the address that the message was sent to. Additionally, the routing connector is responsible for making sure that messages are delivered in a timely manner.

What is Criteria Based Routing?
Criteria based routing is a process in which messages are routed to the appropriate mailbox based on criteria that you specify. This criteria can include the sender or recipient, the message size, the message content, or any other criteria that you specify. This is useful for routing messages to the appropriate mailbox, as well as for managing the flow of messages throughout your organization.

In Exchange Online, this is accomplished through the use of a routing rule. This rule is responsible for taking messages that are sent to or from the organization and routing them to the correct mailbox, depending on the criteria that you specify. Additionally, the routing rule is responsible for making sure that messages are delivered in a timely manner.

How to Configure Centralized Mail Transport and Criteria Based Routing in Exchange Online
In order to configure centralized mail transport and criteria based routing in Exchange Online, you will need to use the Exchange Admin Center (EAC). The EAC is the graphical user interface (GUI) used to manage Exchange Online.

To configure centralized mail transport, you will need to create a routing connector. This is accomplished by navigating to the Mail Flow section in the EAC, and then selecting the Connectors tab. From here, you will be able to create a new connector and specify the settings for the connector.

To configure criteria based routing, you will need to create a routing rule. This is accomplished by navigating to the Mail Flow section in the EAC, and then selecting the Rules tab. From here, you will be able to create a new rule and specify the settings for the rule.

Conclusion
By understanding the concepts of centralized mail transport and criteria based routing in Exchange Online, you will be able to effectively manage and optimize your cloud messaging environment. Additionally, you will be able to configure these features in the Exchange Admin Center (EAC) in order to ensure that your messages are routed to the appropriate mailbox in a timely manner.
References:
Demystifying Centralized Mail Transport and Criteria Based Routing

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