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Our mail domain isn't safe by default for Exchange Online users
Hello all, Our PR Team requested to force automatic download of pictures for internal letters that are sent by the team. We decide to use GP setting "Automatically download content for e-mail from people in Safe Senders and Safe Recipients Lists" from Office an administrative template. It works fine for users with on-prem mailboxes because our mail domain is in the Safe Senders by default, but it doesn't work for users with mailboxes in Exchange Online. For EO mailboxes, pictures of internal letters are not downloaded automatically in classic Outlook. They have to add "@<our mail domain" to Safe Senders list to download pictures automatically. Any attempts to add the same domain by using Set-MailboxJunkEmailConfiguration fail because "the domain is the default mail domain"! (And should be treated as safe). Headers show that letters are not "Anonymous" but internal. It looks like a bug, or we missed something in our Hybrid configuration. Any ideas? King regards, Dmitry Horushin
Microsoft some server IP not in SPF List?
We Have add DNS record v=spf1 include:spf.protection.outlook.com -all , but find to SPF is failed spf:demo.com:2603:1096:301:11b::15 how can we solve this problem , because we need increase the security Level , would like quarantine / set to junk mailbox for SPF Fail mail Thank
Configure Dedicated Exchange Server Application
Currently our product ranning exchange 2019 CU15 with Exchange hybrid, so what else need configure other task for configuration of the dedicated application for Exchange Server. HCW8126 - Admin consent was not granted during the configuration of the dedicated application for Exchange Server. The application will be created but will not function until consent is provided. Please re-run the Hybrid Configuration Wizard (HCW) or grant consent via the Entra ID portal before using the application.
Hotfix update for 2016 CU23 HU18: (KB5066370) breaks OWA and leaves all services disabled
Has anyone else applied the latest hotfix? First of all it tries to validate open files instead of just killing these processes as part of the update, then after rebooting all the services are left in a disabled state. Then I discover it has broken IIS and OWA doesnt work. We have had client issues all day in the office. It looks like another update has been pushed out without sufficient testing. Any help would be grateful at this point, I am looking to take 2 out of 4 servers offline.Exchange 2019 Mailbox Migration Error - Folder conflicts with Exchange Online folder
Hi Exchange Experts, I'm migrating a small Exchange 2019 environment to 365. Been pulling my hair out becuase of just one mailbox giving this error Error description --------------------------- Error: AggregateMailboxFolderConflictPermanentException: The folder 'Files' conflicts with Exchange Online folder 'Files', please move the messages to another folder and restart the job. Data migrated: 0 B (0 bytes) Migration rate: -------------------------------------- Migration user report: 5/14/2025 12:32:05 PM [MEUP300MB0105] Request processing continued, stage CreatingFolderHierarchy. 5/14/2025 12:32:05 PM [MEUP300MB0105] Stage: CreatingFolderHierarchy. Percent complete: 10. 5/14/2025 12:32:12 PM [MEUP300MB0105] Stage: CreatingFolderHierarchy. Percent complete: 10. 5/14/2025 12:32:12 PM [MEUP300MB0105] Fatal error AggregateMailboxFolderConflictPermanentException has occurred. ---------------------- It seems to be a system folder and I've tried to remove files from it (although there're no files in it) using MFCMAPI tool with no success. Renamed the folder and tried to re-run the migration with no luck. Has anyone experience this issue? any thoughts or tips are much appreciated ! Thank you.Domain not routing mail or logins correctly after tenant transfer
Hello Please i need your help on this issue. Domain not routing mail or logins correctly after tenant transfer. I recently removed the domain sustainable.XXXX from an old Microsoft 365 tenant (based in Chile) and added it as the default domain in my new tenant (based in Spain). The domain is showing as Authoritative and in a healthy state in the Microsoft 365 Admin Center. DNS records (MX, SPF, CNAME autodiscover) are all configured correctly and propagate globally (checked with multiple DNS tools). However, I am still experiencing two critical issues: Authentication / Login Redirect. When I try to log in with rphilippe@ sustainable.XXXX in Office apps (desktop and mobile), the login is automatically redirected to the old Chile tenant (…onmicrosoft.com), which no longer has my domain or licenses. This prevents me from signing into Office apps with my licensed email address in the new Spain tenant. Mail Flow – No Inbound Delivery I can send outbound emails from rphilippe@ sustainable.XXX without problems. But inbound emails from Gmail/Yahoo do not appear in Message Trace in Exchange Online. This indicates that messages are not reaching my new tenant at all, despite correct MX records. Steps already taken: Removed domain completely from old tenant. Verified domain ownership in new tenant. Configured all required DNS records at my registrar (Wix). Waited more than X hours since DNS propagation completed (global MX records confirmed). Tested with Message Trace and Quarantine: no trace of inbound messages. Request: Please verify and force a refresh of Home Realm Discovery (HRD) and Exchange Online domain routing for sustainable.XXX, to ensure: Authentication requests for @ sustainable.XXXX point to the correct (Spain) tenant. Inbound email is routed correctly to the new tenant. This appears to be an internal Microsoft propagation/cache issue, not a DNS or local client issue.
How to perform Windows Update for Exchange 2016 DAG Cluster
Hello, I need to install windows server security update on Exchange 2016 DAG which require reboot the server. I will install the updates on the first server Tuesday, and the seconde server on Wednesday. I'm wondering if installing patches on separated days may impact Exchange services, also i need to know the steps to follow before restart each server after installing the patch.I need help with migration
Hello I need to migrate our account to a wider business due to a merger. In general, I need to change the domain name while keeping my email history without losing any data. On top, I need to ensure after that after the change the extensions of our emails from (i.e @ abc.com to @ abd.com) to have access to the emails which are still being sent to @ abc.com, for example being automatically forwarded to the new email addresses.
Update Federation Trust Certificate
Almost five years ago, I had set this up. I realized the cert is about to expire. I only have on test account on prem, everything else is in the cloud. Oauth is set up and we do have token based auth. I followed the steps to generate a new self signed cert, everything looks good even the text file in DNS. The issue is, when I run set-federationtrust - identity "Microsoft Federation Gateway -publishfederationcertificate, I get the following error. [FailureCategory=Cmdlet-Live DomainServicesException] 2B0D1031,Microsoft.Exchange.Management.SystemConfigurationTasks.SetFederationTrust + PSComputerName I have search and and tried several things for TLS 1.2 Enforcing TLS 1.2 on Windows 2019 via the reg Windows Registry Editor Version 5.00 enforce SchUseStrongCrypto Force Powershell to run tls1.2 I had to remove some of the verbage - i think the forum does not like it. Does anyone have any ideas Thanks Paul
