7,342 questions with Exchange Online tags

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How to fix the restriction on my e-mail address - [Moderator note: Personally Identifiable Information removed]@mastertalk.uk.com - listed under Microsoft exchange.

It seems that the use of my e-mail account - [Moderator note: Personally Identifiable Information removed]@mastertalk.uk.com - which runs under Microsoft Exchange is restricted and I don't know why.

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-08-07T10:22:31.27+00:00
Andre Oberholzer 0 Reputation points
commented 2026-08-08T07:16:31.6266667+00:00
Aetherin 190 Reputation points Independent Advisor
1 answer

Emails to Epworth rejected with "Permanent error evaluating DMARC policy"

We use Microsoft 365 Exchange Online and emails sent to recipients at @epworth.org.au are rejected with the error "Permanent error evaluating DMARC policy." This only affects Epworth; emails to other domains are delivered successfully. Has…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-08-04T04:40:31.21+00:00
South East Care 0 Reputation points
edited an answer 2026-08-07T05:12:23.6+00:00
Elena-VH 485 Reputation points Independent Advisor
1 answer One of the answers was accepted by the question author.

Exchange HCW using 2 Exchange 2016 edge servers (stmp1.domain.com and smtp2.domain.com)

Hi All, Looking for some Exchange hybrid configuration wizard guidance. Scenario: EWS published using hybrid.domain.com 2x Edge Servers configured using dedicated FQDNs - edge1.domain.com and edge2.domain.com If I want high availability for SMTP/Edge…

Exchange Online
Exchange Online

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

7,342 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.

1,639 questions
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.

8,194 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.

2,451 questions
asked 2023-01-11T10:53:10.8+00:00
Azhar Pasha Syed 40 Reputation points
accepted 2026-08-07T01:37:06.96+00:00
Azhar Pasha Syed 40 Reputation points
1 answer

Is there a way to trigger a flow when a event is added to another user's calendar that you have Full-Access to?

I have a full-access permission to another user's exchange/mailbox, so I see their Calendar in my outlook. Is there a way to set up a power automate flow to be triggered when that user's personal calendar is updated (add, delete, edit)? I found one…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-08-06T19:10:59.82+00:00
Edward 66 Reputation points
answered 2026-08-06T19:19:24.6933333+00:00
Ryan-N 14,510 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Email Reply Issue

Hi All, I'm experiencing different behavior between Outlook for Mac and Outlook for Windows when replying to emails from an external sender. Scenario: An email is received from an external sender, for example: user1(at)extdomain1.com Outlook for…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-07-30T00:00:30.4366667+00:00
Glenn Maxwell 14,166 Reputation points
accepted 2026-08-06T16:24:57.41+00:00
Glenn Maxwell 14,166 Reputation points
1 answer

Microsoft Entra ID: issue adding custom domain name

I'm looking for some assistance adding a custom domain name. I have added both a txt and mx record at our dns registrar but every time I try and verify it I get the same error message "Unable to verify domain name. Ensure you have added the record…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-08-04T16:14:15.9166667+00:00
Joel Smith 5 Reputation points
commented 2026-08-05T21:22:26.7266667+00:00
Kai-L 16,870 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

Microsoft Defender - clients report a url being marked as malicious

Hello everyone, Our clients reported that one of the links in an email we're sending is being marked as malicious by Microsoft Defender. I've done a lot of searching and it seems like all the solution are tailored for the system administrators…

Exchange Online
Exchange Online

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

7,342 questions
asked 2022-08-16T09:38:44.613+00:00
Dmitry Petrov 21 Reputation points
edited the question 2026-08-05T18:02:56.2366667+00:00
Don Varnau 19,895 Reputation points Volunteer Moderator
1 answer

Migration Assistance

Hi All, Since the Microsoft FastTrack migration experience has moved to the Microsoft 365 admin center, I created a new migration project using the following portal: https://admin.cloud.microsoft/?Q=MACMigrations#/SetupGuidance/Migration My goal is 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.

7,342 questions
asked 2026-08-05T12:21:52.03+00:00
Glenn Maxwell 14,166 Reputation points
answered 2026-08-05T17:11:02.2966667+00:00
Helen Luu 1,865 Reputation points Independent Advisor
1 answer One of the answers was accepted by the question author.

I am experiencing an issue where emails sent to recipients outside Microsoft are not being delivered. - My objective is to have these external emails successfully delivered.

The outbound email is not failing within Power Automate itself. The Office 365 Outlook "Send an email" action submits the message successfully, but Exchange Online rejects it at the transport layer and returns the non-delivery report: "550…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-08-03T18:18:42.89+00:00
Vivek Ranjan 20 Reputation points Microsoft Employee
accepted 2026-08-04T05:33:40.0433333+00:00
Vivek Ranjan 20 Reputation points Microsoft Employee
3 answers

Exchange Online: tenant-wide inbound false positives after restricted sender AS(42004) was lifted - how to request reputation remediation?

Our small business tenant had a restricted sender event this week. An internal operational announcement went to our contractor roster in large BCC batches on 7/26-7/27. By 7/29 one licensed user (the account behind our shared mailbox) was placed on…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-07-31T18:30:56.3233333+00:00
AMSadmin-2204 0 Reputation points
commented 2026-08-03T23:17:17.53+00:00
Hendrix 165 Reputation points Independent Advisor
1 answer

After MC1171845 (quarantine listed per recipient) — how many quarantine records can one Internet Message ID produce, and is RecipientAddress populated in summary results?

We automate release of quarantined messages by Internet Message ID using the ExchangeOnlineManagement module with certificate-based app-only authentication. Following MC1171845 ("Microsoft Defender for Office 365: Enhancing the quarantine…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-08-03T12:47:25.1133333+00:00
Ashay Patel 0 Reputation points
answered 2026-08-03T14:22:20.2433333+00:00
Liora 165 Reputation points Independent Advisor
1 answer

How to cretae classic distribution list

How to cretae classic distribution list please give me steps tpo cretae

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-08-01T11:23:12.9366667+00:00
Priyanka 0 Reputation points
commented 2026-08-03T13:58:13.1333333+00:00
Heimerdinger 90 Reputation points Independent Advisor
2 answers

New Outlook Shared Mailbox Preview Pane Not Loading for Some Users

We're seeing an issue in New Outlook where some users cannot view email content in the preview pane for certain shared mailboxes. The email list loads normally, but the preview pane is blank. Users can still double-click the email to open it, and the…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-07-30T16:13:43.2233333+00:00
Thomas Zeigler 0 Reputation points
answered 2026-08-02T12:59:21.73+00:00
Norazlinda Aziz 0 Reputation points
1 answer

Can't send emails

I can't send emails. Keep getting this message "This message couldn't be delivered because the sending email address was not recognized as a valid sender. The most common reason for this error is that the email address is, or was, suspected of…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-07-31T16:27:28.4+00:00
Shannon 0 Reputation points
commented 2026-08-01T20:37:46.8166667+00:00
Ryan-N 14,510 Reputation points Microsoft External Staff Moderator
3 answers

Duplicates are being imported

Hello, I am using the New-MailboxImportRequest to import .PST files into existing mailboxes. These mailboxes have emails in them that are also included in the .PST file being imported. The import request completes successfully, some needing the…

Exchange Online
Exchange Online

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

7,342 questions
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.

8,194 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.

2,451 questions
asked 2021-06-22T01:42:59.563+00:00
LeighHarding 1 Reputation point
answered 2026-07-31T14:31:46.2666667+00:00
Ted Mittelstaedt 61 Reputation points
1 answer

Group email not connected

I have a group email I installed via exchange but it is disconnected

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-07-31T09:44:54.91+00:00
Olutosin Bakare (UK) 0 Reputation points
edited a comment 2026-07-31T14:30:21.0366667+00:00
Liora D 18,900 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Mail.send API permission

I have a doubt. Granting mail.Send (application) permission to the application object or managed identity (service principal), does it matter anymore. If I directly create a App RBAC policy and restrict the application object or managed identity (Service…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-07-30T14:45:54.5033333+00:00
Dipronil Dey 25 Reputation points
commented 2026-07-31T06:38:03.6833333+00:00
Vasil Michev 127.5K Reputation points MVP Volunteer Moderator
1 answer One of the answers was accepted by the question author.

Multi Function Printers and SMTP Auth deprecation

We are preparing for the 2025 SMTP Auth deprecation. We have a number of multi-function printers that need to be able to scan and send to external email addresses. According to this…

Exchange Online
Exchange Online

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

7,342 questions
asked 2024-08-16T18:22:26.14+00:00
Rayner, June 65 Reputation points
commented 2026-07-30T22:30:13.1533333+00:00
Andreas Hähnel 0 Reputation points
1 answer

How to fix 550 550 Administrative prohibition - envelope blocked - [Moderator note: personal info removed]

Hi all, I've got a user on my tenant who has an AD (on-premise) account with an email address being : ******@mydomain.com with an smtp pointing to an external address from another tenant , let's say : ******@external.com. He is a mailUser on exchange…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-07-30T10:22:31.4+00:00
Baguette_crusher 0 Reputation points
edited an answer 2026-07-30T15:12:58.4333333+00:00
Julie Huynh 2,440 Reputation points Independent Advisor
2 answers

Exchange Online Application RBAC (Application Mail.Send) is not enforced for Azure Automation Managed Identity when using Microsoft Graph Mail.Send

Issue Summary I have configured Exchange Online Application RBAC to restrict an Azure Automation System Assigned Managed Identity so that it can send emails only from a single mailbox. Although the RBAC configuration is successfully created and…

Exchange Online
Exchange Online

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

7,342 questions
asked 2026-07-20T06:55:18.3833333+00:00
Dey, Dipronil 0 Reputation points
edited the question 2026-07-29T06:01:35.9233333+00:00
Griffith N 0 Reputation points Microsoft External Staff Moderator