A few AD and Exchange prerequisites required for Cisco Unified Messaging service[
# Requires Exchange Module
$acctUPN = 'svc_UCUMAgent'
[System.Security.SecureString]$acctPW = Read-Host -AsSecureString "Enter password for $acctUPN account"
$acctPath = 'OU=Service_Accounts,OU=Main,DC=Contoso,DC=com'
$targetDC = 'usmokc4.contoso.com'
$userSearchBase = 'OU=Locations,OU=Main,DC=Contoso,DC=com'
#Create AD account
New-ADUser -Name $acctUPN -CannotChangePassword $true -ChangePasswordAtLogon $false -Description "Used by Cisco Unity Connection Service to provide Exchange Unified Messaging" -Division "UC UM Agent" -Enabled $true -Path $acctPath -SamAccountName $acctUPN -Surname $acctUPN -Title "SERVICE ACCOUNT" -UserPrincipalName $acctUPN -Server $targetDC -AccountPassword $acctPW
New-ManagementRoleAssignment -Name:'ApplicationImpersonation-UM Unity Connection Service' -Role:ApplicationImpersonation -User $acctUPN -DomainController $targetDC
#Per document, set all throttling to null.
New-ThrottlingPolicy -Name ”Cisco IM and Presence User ThrottlingPolicy” -EWSMaxConcurrency $null -EWSMaxSubscriptions $null -EWSPercentTimeInCAS $null -EWSPercentTimeInMailboxRPC $null -EWSFindCountLimit $null -EWSPercentTimeinAD $null
$newThrotPol = Get-ThrottlingPolicy -Identity ”Cisco IM and Presence User ThrottlingPolicy”
#Every Unified Messaging user will have an IPphone and a mailbox - associate the Throttling Policy with each account (Exchange 2010 SP2 RU3)
(Get-ADUser -Server $targetDC -Filter {(ipPhone -ne "$null") -and (msExchMailboxGuid -ne "$null")} -SearchBase $userSearchBase -SearchScope Subtree).SamAccountName | Set-ThrottlingPolicyAssociation -ThrottlingPolicy $newThrotPol -DomainController $targetDC
#Set on UM Service account for downlevel Exchange support
Get-ADUser -Server $targetDC -Identity $acctUPN | Set-ThrottlingPolicyAssociation -ThrottlingPolicy $newThrotPol -DomainController $targetDC References: