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How to Disable Throttling in Microsoft Exchange Server 2013 and Newer

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This article refers to the Barracuda Message Archiver release 5.0 or higher, and on-premise Microsoft® Exchange Server 2013 and 2016.

Microsoft Exchange Server 2013 and 2016 message throttling policies set bandwidth limits and restrict the number of processed messages. Throttling is enabled by default on Microsoft Exchange 2013 and 2016. In order to disable throttling, you must create an appropriate policy and assign it to the service account as documented in the Microsoft Technet article Set Throttling Policy.

Following is a guideline; adjust as necessary for your environment.

Step 1. Create a New Account

Service Account
For more information on creating a Service account, refer to Creating an Email Service Account for Microsoft Exchange Server.

Use the following steps to create a new account:

  1. Log in to the Exchange Server as the administrator, and open the Exchange admin center.
  2. Go to recipients > mailboxes, and click the plus (+) symbol, and click User mailbox.
  3. In the new user mailbox window, enter the new user details, for example, PolicyAdmin.
  4. Click Save. Double-click the new user mailbox to open the Properties.
  5. Enter the account details in the General tab, and then click Apply.
  6. Click the Member Of tab, and add the user as a member of the Domain Users group.

Step 2. Assign Permissions

Use the following steps to assign permissions to the account created in the previous step:

  1. Log in to the Exchange Server as the administrator, and open the Exchange Management Shell.
  2. At the command prompt, type the following command:
    New-ManagementRoleAssignment -Name:BarracudaMessageArchiver -Role:ApplicationImpersonation -User: Policy Admin
    Where Policy Admin represents the new account name.

Step 3. Disable Throttling Policy Enforcement

Use the following steps to disable throttling policy enforcement on the new account, replacing Policy Admin with the new account name:

  1. Log in to the Exchange Server as the administrator, and open the Exchange Management Shell.
  2. At the command prompt, type the following command to create a new throttling policy:
    New-ThrottlingPolicy PolicyAdmin Policy
  3. Press Enter. Type the following command to set the throttling policy:
    Set-ThrottlingPolicy Policy Admin Policy -RCAMaxConcurrency Unlimited -EWSMaxConcurrency Unlimited -EWSMaxSubscriptions Unlimited -CPAMaxConcurrency Unlimited -EwsCutoffBalance Unlimited -EwsMaxBurst Unlimited -EwsRechargeRate Unlimited
  4. Press Enter. type the following command to disable policy enforcement:
    Set-Mailbox "Policy Admin" -ThrottlingPolicy Policy Admin Policy
  5. PressEnter.


throttle

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