Active Directory lookupReplay RPC server wrapperTPR API manager Copy status lookupRemote data provider wrapperSupport API manager Replay core managerVssWriterServer locator manager Seed managerActive managerHealth state tracker Autoreseed managerActive manager RPC server wrapper Disk reclaimer managerFailure item manager

Deployment scenarioRecommendations Single DAG deployed in a single datacenterLocate witness server in the same datacenter as DAG members Single DAG deployed across two datacenters; no additional locations available Locate witness server in primary datacenter Multiple DAGs deployed in a single datacenter Locate witness server in the same datacenter as DAG members. Additional options include: Using the same witness server for multiple DAGs Using a DAG member to act as a witness server for a different DAG Multiple DAGs deployed across two datacenters Locate witness server in the same datacenter as DAG members. Additional options include: Using the same witness server for multiple DAGs Using a DAG member to act as a witness server for a different DAG Single or Multiple DAGs deployed across more than two datacenters Locate the witness server in the datacenter where you want the majority of quorum votes to exist

DQ = 7

DQ = 4 X X X

DQ = 3 X X X X

DQ = 2 X X X X X

NameDynamicWeightNodeWeightState EX111Up

Exchange 2013 guidance more complicated due to Managed Availability Go into maintenance mode Set-ServerComponentState -Component HubTransport -State Draining -Requester Maintenance Set-ServerComponentState -Component UMCallRouter –State Draining –Requestor Maintenance Redirect-Message -Server -Target Suspend-ClusterNode Set-MailboxServer -DatabaseCopyActivationDisabledAndMoveNow $True Set-MailboxServer -DatabaseCopyAutoActivationPolicy Blocked Set-ServerComponentState -Component ServerWideOffline -State Inactive -Requester Maintenance Verify production mode Get-ServerComponentState | ft Component,State -Autosize Get-MailboxServer | ft DatabaseCopy* -Autosize Get-ClusterNode | fl Get-Queue

Exchange 2013 guidance more complicated due to Managed Availability Go into maintenance mode Set-ServerComponentState -Component ServerWideOffline -State Active -Requester Maintenance Set-ServerComponentState -Component UMCallRouter –State Active –Requestor Maintenance Resume-ClusterNode Set-MailboxServer -DatabaseCopyActivationDisabledAndMoveNow $False Set-MailboxServer -DatabaseCopyAutoActivationPolicy Unrestricted Set-ServerComponentState -Component HubTransport -State Active -Requester Maintenance Verify production mode Get-ServerComponentState | ft Component,State -Autosize Get-MailboxServer | ft DatabaseCopy* -Autosize Get-ClusterNode | fl Get-Queue