A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Exchange Online: DKIM uses onmicrosoft.com instead of custom domain
We have an Exchange Online tenant using example.com as a custom domain. An outbound email has the following headers when it first reaches our email gateway: From:…
Exchange Online
Restricted mailbox after sending to 120 recipients
We had a mailbox that was blocked from sending after a press email was sent to 120 recipients. This is below the 500 max recipient threshold so I want to know why it was restricted at all.
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
the shared email [Moderator note: personal identifiable Information removed]@magnet.co.uk when sending email doesnt show on sent items
the shared email [Moderator note: personal identifiable Information removed]@magnet.co.uk when sending email doesnt show on sent items
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Microsoft 365 tenant restricted from sending email (550 5.7.705) after compromised account was remediated
Our Microsoft 365 tenant is currently restricted from sending outbound email with the following error: 550 5.7.705 – Access denied, tenant has exceeded threshold. Microsoft Defender generated the following alert: "Tenant restricted from sending…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
How to create exchange mail user if that user already exsisit in entra id
I already have entra id users. But those users not visible in exchange admin under the contacts(Becasue email license not allocated those users) .So im unable to add those users to any group or distribution list. When i try to create mailuser contact in…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Emails going into other tab
As of 2/2/26 all my new emails are now going into the "other" tab instead of the "focused" tab.
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Lost access to Microsoft Authenticator after phone change — need help restoring account
Hello, I recently changed to a new phone, but I forgot to transfer my Microsoft Authenticator data before switching. Now, when I try to log into Microsoft Authenticator on my new phone, I receive the following message: "**Unable to recover. Your…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Unable to connect to Exchange Online Powershell
Hello, I am unable to login to Exchange Online Powershell using the following steps. I am a global admin and the Powershell is opened in elevated mode. I enter the code below Connect-ExchangeOnline -UserPrincipalName <mylogin> Then the login opens…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Windows for business | Windows Server | User experience | PowerShell
Remote Server returned ‘550 5.7.708 Service unavailable (SMTP)
Hello, I am experiencing an issue sending emails from a Microsoft 365 / Exchange Online account. I have already tried practically every relevant configuration and troubleshooting step I have been able to find, but I continue to receive the same…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Exchange online error HTTP status 403 only on one account but not the other account
It was confirmed for both email address "EWS" enabled via Powershell script. One connect successfully but the other is still failing for about 8 hours since we updated policy. Is it possible that one could take longer to clear? I just…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Calendar Settings
Hi All, I have a shared mailbox, for example, smb1[@]mydomain.com When someone from our team creates a calendar event or meeting on the shared mailbox calendar, the meeting request appears to require acceptance before it is added to the calendar. We…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
How to Improve Spam and Phishing Protection for Exchange Online Users Without E3/E5 Licenses?
We have 10 Microsoft 365 users experiencing a high volume of spam and phishing emails. Users currently have standard Microsoft 365 licenses (no E3/E5). What are the recommended Microsoft best practices to Block spam, phishing, and spoofed emails? what…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
External Guest User Unable to Add Room Mailbox Calendar Despite Organization Relationship and Limited Details Permissions
Hi everyone, I'm hoping someone can confirm whether this behaviour is expected or if there's additional configuration required. Scenario We have two Microsoft 365 tenants with calendar sharing configured between them. The calendar we are trying to share…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Custom mail folders empty
Hello, I am experiencing a serious issue with my Exchange mailbox and would appreciate your assistance as soon as possible. Today, I discovered that all of my custom mail folders (Banks, Bills, Work, HFX, Lotto, J&B, TF, and others) became empty at…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
DKIM in M365 - Mydomain.com vs Mydomain.onmicrosoft.com
Google reveals the title is taken from a Spiceworks thread. The question relates to an o365info article "Add DKIM and DMARC for onmicrosoft.com domain in Microsoft 365". Performing this in M365 will generate another set of DKIM CNAME…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Get connection closed by remote host after executing Connect-ExchangeOnline PoweShell
Hello Team, I've imported the Exchange Online PowerShell module to connect with the Exchange portal for performing Exchange-related activities. However, after MFA (Multi-Factor Authentication), we're encountering the attached response. Could you please…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Enchange 2010 to Exchange Online migration - Migrating mailboxes used by applications
Hello, We are migrating an Exchange Server 2010 to Exchange Online. All user mailboxes were already migrated. There are 10 mailboxes that were used by server applications, using a Receive Connector with IP addresses cofigured for every source server.…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
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.
Exchange | Hybrid management
The administration of a hybrid deployment that connects on-premises Exchange Server with Exchange Online, enabling seamless integration and centralized control.
Email migration from One tenant to another of Microsoft
Need detailed steps to migrate emails which are 40 GB data each and 7 account from one MS Tenant to another, kindly suggest. Thanks
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Exchange online migration
First time I work with exchange online, where I need to migrate a user account that today has a IMAP account. So overall I just look for best practise. Overall I need to change the MX record to point to Exchange online. Then I need to migrate the imap…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Exchange | Hybrid management
The administration of a hybrid deployment that connects on-premises Exchange Server with Exchange Online, enabling seamless integration and centralized control.
exchange online migration
So have Two office 365 tenants - that have to migrate, so it ends up in already existance of company-b.com Company/tenant = @company-a.com Company/tenant = @company-b.com So all company-a mailboxes must be migrated to company-b. What is the best way…
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.