653 questions with Exchange | Exchange Server | Development tags

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Connect-OrganizationAddInService using Entra ServicePrincipal ID

I am trying to find if someone has successfully done this, basically automatize the deployment of an Add-in to Office 365 Client Secret: "1111111111111111111" (This is a secret that should be protected and not shown, I am having a look how to…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,399 questions
Exchange | Exchange Server | Development
Windows for business | Windows Server | User experience | PowerShell
asked 2024-04-25T20:01:49.8666667+00:00
Juan Perez 0 Reputation points
commented 2026-09-07T10:58:32.51+00:00
JuliaMarvin 22,275 Reputation points Volunteer Moderator
1 answer

Can we use standalone edge without edge sync to use SMTP relay over port 587

Hi, Can we use standalone edge without edge sync to use SMTP relay over port 587. Edge without exchange and installed in work group with no access to active directory server. Only port 25 SMTP relay works or port 587 also works Cheers Priya

Exchange | Exchange Server | Development
asked 2026-08-17T05:53:03.9233333+00:00
Priya Jayaraman 466 Reputation points
edited the question 2026-08-24T19:59:56.65+00:00
Clover-L 25 Reputation points Microsoft External Staff Moderator
2 answers

Getting error while creating Microsoft Graph Distribution list of beta version

I tried to create a distribution list using example at url https://learn.microsoft.com/en-us/graph/api/user-post-distributionlists?view=graph-rest-beta&tabs=http I tried in Postman with method => POST /users/{id |…

Exchange | Exchange Server | Development
asked 2026-07-21T08:46:49.3333333+00:00
Baljeet Kaur 0 Reputation points
commented 2026-07-22T11:52:47.11+00:00
Michelle-N 20,735 Reputation points Microsoft External Staff Moderator
2 answers

outlook.office365.com/ews/exchange.asmx return (503) Server Unavailable

Hello, Our application uses token-based authentication to retrieve emails from a specific mailbox, configured as shown below: We are currently encountering a 503 Server Unavailable error and are unsure about the next steps for troubleshooting or…

Exchange | Exchange Server | Development
asked 2026-05-27T07:51:44.6733333+00:00
Thu Le 0 Reputation points
commented 2026-06-01T07:35:10.3033333+00:00
Anonymous
1 answer

Request to remove domain from organization

I would like to remove my domain from an organization

Exchange | Exchange Server | Development
asked 2025-10-14T16:15:31.91+00:00
Arinda Bothma 0 Reputation points
answered 2026-05-20T15:26:00.6433333+00:00
JP 0 Reputation points
2 answers

Connect-ExchangeOnline Certificate Based Authentication with Exchange.ManageAsAppv2

The error from -verbose output VERBOSE: Returning precomputed version info: 3.9.2 VERBOSE: ModuleVersion: 3.9.2 VERBOSE: [ThreadID: #] Trying to get a new token from AAD VERBOSE: [ThreadID: #] Trying to acquire token based on UI flow VERBOSE:…

Exchange | Exchange Server | Development
asked 2026-04-02T18:19:10.3733333+00:00
Varga, Joseph 0 Reputation points
commented 2026-04-06T06:02:24.0466667+00:00
Anonymous
1 answer One of the answers was accepted by the question author.

Exchange Services Disabled during Exchange SE setup at STEP 8

Hello everyone, We're actively Trying to migrate our Exchange 2016 servers to Exchange SE on Windows Server 2025. During Step 8. the setup wizard fails to continue as the services are disabled. enabling the services manually does not help. (The Server is…

Exchange | Exchange Server | Development
asked 2026-02-24T20:18:31.4666667+00:00
John 20 Reputation points
accepted 2026-03-18T22:27:05.74+00:00
John 20 Reputation points
2 answers

Entra ID Application oAuth Permission issue

We are trying to send the notification using OAuth2.0 via microsoft 365 exchange online.However we are unable to Authenticate and send the notifications. AuthenticationException: 535: 5.7.3 Authentication unsuccessful we did some research and found that…

Exchange | Exchange Server | Development
asked 2026-02-13T17:15:38.3133333+00:00
Tyfone Inc 0 Reputation points
answered 2026-03-12T22:02:18.3533333+00:00
Mike Anderson 0 Reputation points
1 answer

Emails received via an exchange api call have supposedly invalid email address from "fromEmail"

Hi , We have a customer who connected an account using our application. In our logs we noticed for some of the emails the fromEmail addresses that we receive are more than 255 character long. We are curious on two things. ```1. Are these invalid emails.…

Exchange | Exchange Server | Development
asked 2026-02-17T19:26:25.0033333+00:00
Dumbre, Rohit 0 Reputation points
commented 2026-02-20T00:54:25.8866667+00:00
Kha-N 8,265 Reputation points Microsoft External Staff Moderator
1 answer

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 30 Reputation points
commented 2026-01-20T08:01:10.1266667+00:00
Kudos-Ng 15,050 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
Anonymous
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 30 Reputation points
commented 2026-01-15T10:06:06.5233333+00:00
Johnny Blaze 30 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 16,830 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 105 Reputation points
accepted 2026-01-12T11:30:27.3666667+00:00
Santiago Cruz 105 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
Anonymous
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 16,830 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.

7,399 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.

1,648 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.

8,199 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.

2,455 questions
asked 2023-06-20T15:12:52.9866667+00:00
TA.Saurabh.Singh 46 Reputation points
commented 2026-01-06T06:14:12.73+00:00
Anonymous
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 8,380 Reputation points Microsoft External Staff Moderator