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Exploring ExchangeOnlineManagement 3.7.0: Features and Changes

What's new in the Exchange Powershell Module, and what are the reasons?

ExchangeOnlineManagement 3.7.0 brings several updates and enhancements to the Exchange Online PowerShell module. This release introduces new features like extended message trace history, optional help file loading, and improvements to inbound IPv6 support. Additionally, Microsoft has updated the timeline for external recipient rate limits and introduced new cmdlets for managing these changes.

Message Trace

Ability to query up to 90 days of historical data. Please note that you will only be able to query 10 days’ worth of data per query.

It is now possible to request a trace without waiting for a report to be generated, and this for up to 90 days.

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Get-MessageTraceV2
Get-MessageTraceV2 -StartDate (Get-Date).AddDays(-10) -EndDate (Get-Date) 
#Get-MessageTraceV2 -StartDate (Get-Date).AddDays(-10) -EndDate (Get-Date) -ResultSize 5000
Get-MessageTraceV2 -StartingRecipientAddress [E-Mail-Address]

Optional Help File

Starting with version 3.7.0 of the Exchange Online PowerShell module, the help file will no longer be loaded by default. Instead, if you want to load the help files, you will need to use a new parameter called LoadCmdletHelp.

Working with the shell and figure out how to use it, got a bit harder, as Get-Help is not available by default anymore. Preload it or use the documentations over web1.

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Connect-ExchangeOnline -ShowBanner:$false -LoadCmdletHelp:$true
# Update-Help

Connect-IPPSSession -ShowBanner:$false #-LoadCmdletHelp:$true
# Connect-IPPSSession: A parameter cannot be found that matches parameter name 'LoadCmdletHelp'.

Inbound IPv6

Microsoft will begin gradually allocating IPv6 addresses to all customer Accepted Domains that use Exchange Online for inbound mail, including *.onmicrosoft.com domains.

Check-out the following blog-post on how to opt-in for IPv6: Opt-in to Enable or Disable IPv6 in Exchange Online

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#Get-IPv6StatusForAcceptedDomain "contoso.com"
Get-IPv6StatusForAcceptedDomain -Domain "contoso.com" | fl

Recipient Limit

Exchange Online planned to enforce an external recipient rate limit of 2,000 recipients in 24 hours. However, they have decided to delay the rollout of the cloud hosted Mailbox External Recipient Rate Limit (MERRL) by about 6 months.

  • Phase 1 - October 2025 delayed to ~April/Mai 2026
  • Phase 2 - April 2026 delayed to ~October/November 2026

Review mailboxes with high-volume sending profiles (service accounts) and use third-party solutions for newsletters.

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Get-TenantRecipientLimitInfo -BlockingScenario:TenantRecipientOutboundRate 
# ExternalRecipientLimit: 5000

Exchange Permission (Off Topic)

Do you know which Entra Role correlates to which Exchange RBAC Role?
Have you ever wondered which permission is needed to run a specific cmdlet?

Explore the provided website to learn more about permissions and roles, and find useful resources:

Summary

The new features, such as extended message trace history and IPv6 support, are positive steps forward. The delay in the planned external recipient rate limit gives admins more time to adjust, offering a sense of relief for many. Additionally, it provides extra time to raise awareness and prepare for the upcoming changes announced for the year ahead. Wish you all a good day

  1. ExchangePowerShell - Learn ↩