It is recommended to enable Datacenter Activation Coordination (DAC) mode for Exchange database availability groups that meet the criteria.
Why using transport rules for email signatures and disclaimers may not give you the results you’re hoping for.
This article covers the various methods that can be used to manage email addresses for multiple users in Exchange Server and Office 365.
Applying storage quotas to Exchange Server mailboxes is a best practice, to avoid capacity, performance, and manageability problems.
When deploying new Exchange servers it is a best practice to deploy multi-role servers.