Exchange 2013 TransportRoles Data folder very large

Windows server 2012 + exchange 2013

Exchange DB =  50 GB

 TransportRoles Data  = 14GB

This nromal ?
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Amit KumarCommented:
As you are using Exchange 2013 so new feature has been introduced by MS is SafetyNet. This can be because of this. unfortunetly till now we can't configure maximum directory size for SafetyNet but we can configure retention as in Period. See this article

Transport storage requirements

Since transport components (with the exception of the front-end transport component on the CAS role) are now part of the Mailbox role, we have included CPU and memory requirements for transport with the general Mailbox role requirements described later. Transport also has storage requirements associated with the queue database. These requirements, much like I described earlier for mailbox storage, consist of capacity factors and IO throughput factors.

Transport storage capacity is driven by two needs: queuing (including shadow queuing) and Safety Net (which is the replacement for transport dumpster in this release). You can think of the transport storage capacity requirement as the sum of message content on disk in a worst-case scenario, consisting of three elements:

The current day’s message traffic, along with messages which exist on disk longer than normal expiration settings (like poison queue messages)
Queued messages waiting for delivery
Messages persisted in Safety Net in case they are required for redelivery

To configure SafetyNet retention please follow this article.

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