646 questions with Exchange | Exchange Server | Development tags

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What is the recommended methodology for diagnosing migration failures and ensuring session stability during an Exchange Server SE deployment?

Our move to Exchange Server SE has triggered intermittent mailbox migration issues for critical teams. I'm looking for the correct cmdlets to troubleshoot these failures and a solution to get the migrations back on track.

Exchange | Exchange Server | Development
asked 2026-01-15T10:33:56.82+00:00
Johnny Blaze 25 Reputation points
commented 2026-01-20T08:01:10.1266667+00:00
Kudos-Ng 12,045 Reputation points Microsoft External Staff Moderator
2 answers

Replacing X-Anonymous TLS with Mutual TLS (mTLS) on Exchange Server Default Receive Connectors

Hello, I am hoping that someone can provide some insight and direction for a request that my organizations' Cybersecurity Team made. I am being requested to replace X-Anonymous TLS with Mutual TLS on Exchange Server SE Default Receive Connectors in the…

Exchange | Exchange Server | Development
asked 2026-01-14T19:52:02.6466667+00:00
Harris, Ricardo 0 Reputation points
edited a comment 2026-01-19T04:48:37.57+00:00
Jade-T 9,345 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Exchange Online PowerShell Error

Please help: Cannot process argument transformation on parameter 'Identity'. Cannot convert value "" to type "Microsoft.Exchange.Configuration.Tasks.RecipientIdParameter". Error: "Parameter values of type…

Exchange | Exchange Server | Development
asked 2025-11-22T10:58:33.0133333+00:00
Johnny Blaze 25 Reputation points
commented 2026-01-15T10:06:06.5233333+00:00
Johnny Blaze 25 Reputation points
1 answer One of the answers was accepted by the question author.

Linked mailbox authentication failure in Exchange Server 2019 resource forest

I’ve created linked mailboxes for users from a trusted account forest using New-Mailbox -LinkedMasterAccount. The mailboxes are created successfully and visible in EAC, but users are unable to log in via Outlook or OWA and receive access denied or…

Exchange | Exchange Server | Development
asked 2026-01-14T09:24:20.6533333+00:00
Imran Qureshi 240 Reputation points
accepted 2026-01-14T13:22:08.23+00:00
Imran Qureshi 240 Reputation points
2 answers

emails rejected at gmail because of failed DMARC verification

Unfortunately, since 4 days, all of emails send to gmail- or outlook-account are rejected because they did not pass DMARC verification as followed: [<Moderator note: personal info removed> .mail.protection.outlook.com] rejected your message to the…

Exchange | Exchange Server | Development
asked 2026-01-12T12:01:26.5933333+00:00
Dr. Sebastian Dunda 0 Reputation points
commented 2026-01-13T11:15:01.4466667+00:00
Hin-V 11,655 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

Which Exchange configuration areas should be reviewed

How can a large on-premises Exchange Server 2019 environment configured in a Hybrid deployment with Exchange Online be troubleshot when, after recent infrastructure changes (certificate renewal and firewall updates), the following issues occur: …

Exchange | Exchange Server | Development
asked 2026-01-12T08:19:22.2166667+00:00
Santiago Cruz 80 Reputation points
accepted 2026-01-12T11:30:27.3666667+00:00
Santiago Cruz 80 Reputation points
1 answer One of the answers was accepted by the question author.

How to validate connector configuration and ensure consistent mail routing during Exchange Server SE deployment?

During Exchange 2019 and Exchange Server SE coexistence, some SMTP applications experience intermittent mail flow failures. While basic health checks pass, PowerShell outputs differ across servers. How should I use cmdlets like Get-SendConnector,…

Exchange | Exchange Server | Development
asked 2026-01-09T07:16:56.2733333+00:00
Hanah Cori 60 Reputation points
commented 2026-01-09T13:56:03.22+00:00
Vergil-V 9,055 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

How identify the root cause and stabilize mailbox migrations during an Exchange SE rollout

My second question: After upgrading part of our messaging infrastructure to Exchange Server SE, several user mailbox migrations began failing intermittently, causing delays for business-critical teams. Any cmdlet to diagnostic what happen and how to fix…

Exchange | Exchange Server | Development
asked 2026-01-09T07:21:10.4266667+00:00
Hanah Cori 60 Reputation points
accepted 2026-01-09T13:12:43.5466667+00:00
Hanah Cori 60 Reputation points
2 answers One of the answers was accepted by the question author.

What happen with the newest KB update of Exchange Sever SE

Hi, Exchange Management Shell is error right after the newest KB update ? Every cmdlet going to error now. Any recognized from MS ?

Exchange | Exchange Server | Development
asked 2026-01-05T12:45:30.83+00:00
Rachal Camp 80 Reputation points
edited a comment 2026-01-06T12:06:17.8933333+00:00
Hin-V 11,655 Reputation points Microsoft External Staff Moderator
1 answer

Tenant to tenant migration

We completed tenant (source) m365 Domain A to tenant (destination) m365 Domain B migration. Migrated Users using domain B accounts and wish to continue receive emails from Domain A accounts. Tasks:1 1.Now we are looking to detach domain A from source…

Exchange Online
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
6,896 questions
Exchange | Exchange Server | Other
Exchange | Exchange Server | Other
A robust email, calendaring, and collaboration platform developed by Microsoft, designed for enterprise-level communication and data management.Miscellaneous topics that do not fit into specific categories.
1,561 questions
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,091 questions
Exchange | Hybrid management
Exchange | Hybrid management
The administration of a hybrid deployment that connects on-premises Exchange Server with Exchange Online, enabling seamless integration and centralized control.
2,387 questions
asked 2023-06-20T15:12:52.9866667+00:00
TA.Saurabh.Singh 41 Reputation points
commented 2026-01-06T06:14:12.73+00:00
Bonney Sharma 0 Reputation points
3 answers

Getting w3wp.exe dmp file continuously on exchange server 2019

Getting w3wp.exe dmp file continuously. can any one help here. DMP log mentioned below. !analyze…

Exchange | Exchange Server | Development
asked 2025-11-24T16:23:34.0266667+00:00
Rishi Kesh Singh 175 Reputation points
commented 2025-12-31T06:59:21.8766667+00:00
Austin-H 7,495 Reputation points Microsoft External Staff Moderator
1 answer

Understanding Microsoft Message-ID Email Header

Hi All, I would like to understand further on how Microsoft generates its message-id that is found in the email headers. I noticed the message-id ended with "prod.outlook.com" at the end of the message-id …

Outlook | Windows | Classic Outlook for Windows | For business
Exchange | Exchange Server | Development
asked 2021-09-06T07:09:14.4+00:00
Alfi D 26 Reputation points
answered 2025-12-25T19:40:55.47+00:00
Miriam Azevedo 0 Reputation points
1 answer

How to fix exchange server installation that shows schema or enterprise admin not found whereas the user has the permission

I have a root domain and child domain in a forest. I tried installing an exchange server in a child domain but it is showing the account doesnt have schema or enterprise admin rights. The user account has the rights and permissions.

Exchange | Exchange Server | Development
asked 2025-12-21T19:03:14.5233333+00:00
John Adegbite 0 Reputation points
commented 2025-12-23T00:20:27.93+00:00
Hani-Ng 7,000 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Help me to connect Exchange sever PWS

Hi I’m unable to establish a remote PowerShell session to an on-premises Exchange Server. When running: New-PSSession -ConfigurationName Microsoft.Exchange ` -ConnectionUri http://exchangeserver.domain.local/PowerShell/ ` -Authentication…

Exchange | Exchange Server | Development
asked 2025-12-18T13:06:52.07+00:00
Arizaga Debry 60 Reputation points
commented 2025-12-18T14:41:11.57+00:00
Hin-V 11,655 Reputation points Microsoft External Staff Moderator
0 answers

Getting Unauthorized issue for exchange admin reporting API's

Hi Team We are facing multiple Unauthorized issues while calling below exchange admin reporting APIs - https://reports.office365.com/ecp/reportingwebservice/reporting.svc/MailDetailDlpPolicy …

Exchange Online
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
6,896 questions
Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,091 questions
Microsoft Security | Microsoft Authenticator
asked 2023-12-22T13:07:30.93+00:00
Anonymous
commented 2025-12-12T20:03:03.5033333+00:00
Vipin Sakhare 5 Reputation points
1 answer One of the answers was accepted by the question author.

PowerShell issue while trying to adjust mailbox transport settings in Exchange Server

I’m running into a PowerShell issue while trying to adjust mailbox transport settings in Exchange Server. I attempted to run the following cmdlet: Set-MailboxTransportService -Identity "Server01" -MaxSendSize 50GB but PowerShell throws an…

Exchange | Exchange Server | Development
asked 2025-12-12T09:57:30.4866667+00:00
Schott Cyndi 105 Reputation points
accepted 2025-12-12T12:06:02.7+00:00
Schott Cyndi 105 Reputation points
3 answers

Exchange 2016

PLZ egal – Notfalleinsatz bei  fehlerhafter Exchange Migration OnPrem (2016 > 2019)   Seit dem lokalen Update von 2016 auf EX 2019 ist der ausgehende Konnektor für mailvorwarding an das zu nutzenden Mailrelay ohne Funktion. Setup des 2019 hat…

Exchange | Exchange Server | Development
asked 2025-12-09T10:36:05.9366667+00:00
Mustafa Ergün - ITventive AG 0 Reputation points
commented 2025-12-10T14:19:48.4433333+00:00
Hin-V 11,655 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

Exchange Server 2019 – How to Improve Mail Flow Stability Under Heavy Load?

I’m looking for guidance on optimizing mail flow performance in Exchange Server 2019 after noticing intermittent delays when the server is under moderate or heavy load. Message Tracking shows that emails occasionally sit in the Submission or Categorizer…

Exchange | Exchange Server | Development
asked 2025-12-10T09:43:38.5733333+00:00
Montez Martha 60 Reputation points
accepted 2025-12-10T13:59:36.8933333+00:00
Montez Martha 60 Reputation points
2 answers One of the answers was accepted by the question author.

Send form submissions from WordPress 365 SMTP

Hello. I'm having difficulty convincing my email host provider that we need to register our site (obtain license and secret keys) to send form content via his 365 mail services. Am I wrong? We cannot use a Microsoft form as (from what I understand) it…

Exchange | Exchange Server | Development
asked 2025-12-04T18:30:41.1933333+00:00
Mathew Sandford 20 Reputation points
accepted 2025-12-09T23:40:12.5566667+00:00
Mathew Sandford 20 Reputation points
2 answers One of the answers was accepted by the question author.

Exchange Server 2019 ECP and OWA fail to load with 500 error

On my Exchange Server 2019, both the ECP and OWA portals suddenly stopped loading and only display a 500 Unexpected Error after login. The login page appears, but after entering credentials, the page fails to load. Mail flow and Outlook connectivity are…

Exchange | Exchange Server | Development
asked 2025-11-04T07:34:37.8+00:00
Erin Cruz 65 Reputation points
answered 2025-12-05T05:21:55.42+00:00
Marcos Cristian Munguia Bustillo 0 Reputation points