The Preferred Architecture (PA) is the Exchange Engineering Team’s best practice recommendation for what we believe is the optimum deployment architecture for Exchange 2016, and one that is very similar to what we deploy in Office 365.
While Exchange 2016 offers a wide variety of architectural choices for on-premises deployments, the architecture discussed below is our most scrutinized one ever. While there are other supported deployment architectures, they are not recommended.The PA is designed with several business requirements in mind, such as the requirement that the architecture be able to:
Set-DatabaseAvailabilityGroup <DAG> -FileSystem ReFSBitLocker is used to encrypt each disk, thereby providing data encryption at rest and mitigating concerns around data theft or disk replacement. For more information, see Enabling BitLocker on Exchange Servers. To ensure that the capacity and IO of each disk is used as efficiently as possible, four database copies are deployed per-disk. The normal run-time copy layout ensures that there is no more than a single active copy per disk. At least one disk in the disk pool is reserved as a hot spare. AutoReseed is enabled and quickly restores database redundancy after a disk failure by activating the hot spare and initiating database copy reseeds.
Note: While your environment may not use IPv6, IPv6 remains enabled per IPv6 support in Exchange.
Note: The Office Online Server infrastructure does not need to be exclusive to Exchange. As such, the hardware guidance takes into account usage by SharePoint and Skype for Business. Be sure to work with any other teams using the Office Online Server infrastructure to ensure the servers are adequately sized for your specific deployment.The Exchange servers within a particular datacenter are configured to use the local Office Online Server farm via the following cmdlet:
Set-MailboxServer <East MBX Server> –WACDiscoveryEndPoint https://oos-east.contoso.com/hosting/discovery
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