2,321 questions
1 answer
CUTOVER to HYBRID -- Is it possible
If an Org went through a cutover migration, but it was not fully completed, is it possible to switch strategy to use hybrid migration? OrgA had a partner setup Exch2013 for cutover migration. OrgA didn't have knowledge of impact of cutover migration,…
Exchange | Hybrid management
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(240, 81%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EXS%3C/text%3E%3C/svg%3E)
2 answers
my email was flagged as spam
currently, i running a zimbra mail server and o365 at the same time, i config o365 to manage all inbound and outbount mail. Now, my email (from zimbra) flagged as spam even thought email header said my mail was success routing through o365 infrastructure…
Exchange | Hybrid management
2,321 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(32, 93%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EL%3C/text%3E%3C/svg%3E)
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(105.60000000000001, 84%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHN%3C/text%3E%3C/svg%3E)
0 answers
exchange Edgesync service is not starting
On Exchange 2019 server the service MS Exchange Edgesync is not starting
Exchange | Hybrid management
2,321 questions
asked 2025-08-10T08:13:25.52+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(259.20000000000005, 89%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMM%3C/text%3E%3C/svg%3E)
Mohammed Muzzamiluddin
0
Reputation points
asked 2025-08-10T08:13:25.52+00:00
Mohammed Muzzamiluddin
0
Reputation points
0 answers
Migrated exchange server from 2016 to 2019 upon testing send-mailmessage it gives error
Migrated exchange server from 2016 to 2019 upon testing send-mailmessage it gives error Send-MailMessage : Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. At line:38 char:3 + …
Exchange | Hybrid management
2,321 questions
asked 2025-08-10T08:12:07.6966667+00:00
Mohammed Muzzamiluddin
0
Reputation points
asked 2025-08-10T08:12:07.6966667+00:00
Mohammed Muzzamiluddin
0
Reputation points
0 answers
Outbound authentication failed with error KdcUnknownEncryptionType
We have Exchange running in Hybrid mode, only using it for SMTP email. The issue we are having is that out of nowhere, Exchange will stop sending smtp emails and the error in the log is this. -- Outbound authentication failed with error…
Exchange | Hybrid management
2,321 questions
asked 2025-08-08T14:56:44.05+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(57.599999999999994, 23%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGR%3C/text%3E%3C/svg%3E)
Gavin Ross
101
Reputation points
asked 2025-08-08T14:56:44.05+00:00
Gavin Ross
101
Reputation points
3 answers
How to clear all On-premises attributes from previously synchronized Azure AD users
Hi, Three years ago, we made a cut over to an on-premises domain with our Azure AD in order to have a cloud-only setup. Now we need to synchronize with the new Active Directory infrastructure and the new on-premises domain. Users in Azure AD that were…
Windows for business | Windows Client for IT Pros | Directory services | Active Directory
Exchange | Hybrid management
2,321 questions
Microsoft Security | Microsoft Entra | Microsoft Entra ID
25,556 questions
asked 2023-06-20T11:34:00.3166667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(6.4, 61%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDD%3C/text%3E%3C/svg%3E)
Denis Debijađi
20
Reputation points
answered 2025-08-05T12:11:06.3233333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(124.80000000000001, 59%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELC%3C/text%3E%3C/svg%3E)
Ludovic Cadet
0
Reputation points
1 answer
One of the answers was accepted by the question author.
Exchange 2019 hybrid wizard questions
Exchange 2019. Cu14. Can I complete the wizard with a self-signed certificate or do I need to purchase a 3rd party certificate? For FQDN, I would just use my OWA URL? For the install at the end of the wizard, what all does this entail? Due to potential…
Exchange | Hybrid management
2,321 questions
asked 2025-08-04T16:15:14.19+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(163.2, 7.000000000000001%, 25%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESD%3C/text%3E%3C/svg%3E)
Susan Dodds
321
Reputation points
accepted 2025-08-05T01:42:56.9666667+00:00
Susan Dodds
321
Reputation points
2 answers
Migration not working in exchange server
We have a client whose Exchange Server 2019 was impacted by a ransomware attack about a month ago. As a result, we migrated all services to a new server. While everything is functioning properly after the migration, the email migration process(On-prem to…
Exchange | Hybrid management
2,321 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(35.2, 37%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EP%3C/text%3E%3C/svg%3E)
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(217.60000000000002, 19%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKN%3C/text%3E%3C/svg%3E)
2 answers
HCW8001 - Issue
Вітаю. Намагаюсь налаштувати гібридну конфігурацію Exchange (2016). І отримую помилку "HCW8001 - Unable to determine the tenant routing domain". Попередньо виконані кроки. В тенанті M365 додано домен з підтвердженням через "txt"…
Exchange | Hybrid management
2,321 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(297.6, 54%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EV%3C/text%3E%3C/svg%3E)
0 answers
Moving Exchange 2019 to 365 questions
Exchange 2019 Cu14. Self-signed certificate, no Entra/Azure. 365 business basic. Is it possible to migrate Exchange 2019 mailboxes to Exchange online without an Entra/Azure subscription? Is an Entra/Azure subscription needed to maintain a hybrid…
Exchange | Hybrid management
2,321 questions
asked 2025-08-03T02:01:07.9933333+00:00
Susan Dodds
321
Reputation points
asked 2025-08-03T02:01:07.9933333+00:00
Susan Dodds
321
Reputation points
1 answer
One of the answers was accepted by the question author.
Azure Hybrid join failes
ObjectGUID in Active Directory: bde852fd-48b6-4600-a8a2-4a596bc1989a PS C:\Users\A_KallehaveI> Get-ADComputer -filter {ObjectGUID -eq "bde852fd-48b6-4600-a8a2-4a596bc1989a"} DistinguishedName :…
Windows for business | Windows Client for IT Pros | Directory services | Active Directory
Exchange | Hybrid management
2,321 questions
Microsoft Security | Microsoft Entra | Microsoft Entra ID
25,556 questions
asked 2024-07-17T13:44:36.03+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(192, 51%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKI%3C/text%3E%3C/svg%3E)
Kallehave Isaak
20
Reputation points
edited a comment 2025-08-02T17:02:41.31+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(12.8, 76%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EV%3C/text%3E%3C/svg%3E)
VarunTha
14,865
Reputation points Microsoft External Staff
Moderator
1 answer
AAD Sync errors 8344 on export for a small number of accounts
Good morning hive mind! I am struggling to find what is causing error 8344 on just 8 accounts on Export sync with AAD, getting error 8344 "Insufficient access rights to perform the operation" we have enabled inheritance on the MSOL account,…
Exchange | Hybrid management
2,321 questions
Microsoft Security | Microsoft Entra | Microsoft Entra ID
25,556 questions
asked 2024-05-21T09:42:43.29+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 33%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESG%3C/text%3E%3C/svg%3E)
Spencer Guest
21
Reputation points
edited a comment 2025-08-01T14:35:58.8633333+00:00
VarunTha
14,865
Reputation points Microsoft External Staff
Moderator
2 answers
HCW fails with HCW8001 – Unable to determine the tenant routing domain after Set-MsolDirSyncEnabled -EnableDirsync $true
I am migrating from Exchange 2013 to MS Business Basic. It is small organzation running only single server Win2012R2 AD+Exchange combined and one other server Win2016. I have added UPN identical with default email domain to the local AD before running…
Exchange | Hybrid management
2,321 questions
asked 2023-12-02T20:13:04.8533333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(275.2, 9%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELK%3C/text%3E%3C/svg%3E)
Luděk Hejrovsky
0
Reputation points
commented 2025-07-30T01:54:43.8966667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(268.8, 6%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJP%3C/text%3E%3C/svg%3E)
Jax Planet
91
Reputation points
3 answers
One of the answers was accepted by the question author.
unable to open shared mailbox
Hi All One of my user is unable to open shared mailbox in new outlook for MAC. in old outlook for MAC-->Tools--Accounts--Advanced--Select Delegates--Open these additional mailboxes: Added shared mailbox and it is working fine. In new outlook for…
Exchange Online
Exchange Online
A Microsoft email and calendaring hosted service.
6,310 questions
Microsoft 365 and Office | Install, redeem, activate | For business | MacOS
Outlook | Windows | Classic Outlook for Windows | For business
27,442 questions
Exchange | Hybrid management
2,321 questions
asked 2023-12-10T00:30:40.9033333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(179.20000000000002, 7.000000000000001%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGM%3C/text%3E%3C/svg%3E)
Glenn Maxwell
12,901
Reputation points
commented 2025-07-30T23:06:21.4333333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(76.8, 31%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EWH%3C/text%3E%3C/svg%3E)
Whit Haney
0
Reputation points
1 answer
Issue with Exchange 2019 on premise management shell after server 2025 "upgrade"
This is occurring on 2 sites that we are trying to migrate from on premise exchange and since the "auto" upgrade of server 2025 happened we are unable to access the management console The Exchange Admin Centre appears to be working fine and…
Exchange | Exchange Server | Other
1,476 questions
Exchange | Hybrid management
2,321 questions
asked 2025-02-10T11:51:41.78+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(41.6, 22%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDW%3C/text%3E%3C/svg%3E)
Darren Woolley
0
Reputation points
edited a comment 2025-07-17T20:16:58.1533333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(54.400000000000006, 10%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EML%3C/text%3E%3C/svg%3E)
Michael Lovett
0
Reputation points
1 answer
One of the answers was accepted by the question author.
calendar sharing across organizations where the external user initially sees your calendar, but new events don't appear.
I have Hybrid setup- exchange 2019 with exchange online. i have federation trust enabled and cloud to on-prem and on-prem to cloud free/busy working without issue. i have requirement to share my calendar to external organization and i was able to add it…
Exchange | Hybrid management
2,321 questions
asked 2025-06-25T05:17:04.26+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(224.00000000000003, 39%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKJ%3C/text%3E%3C/svg%3E)
Kanchana Jayathilake
20
Reputation points
accepted 2025-06-27T11:16:16.7633333+00:00
Kanchana Jayathilake
20
Reputation points
1 answer
forward from Gsuite to M365 doesn't work
Hi, i'm migrating my organization frmo Gsuite to M365. Since it is a phased migration i still have Mx record pointing at google MTA. users already in O365 have a. forwarding rule withing Google. point is: this rule sometimes just doesn't work i se…
Exchange | Hybrid management
2,321 questions
asked 2025-06-26T16:55:38.3533333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(240, 5%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGC%3C/text%3E%3C/svg%3E)
Gabriele Cafaro
0
Reputation points
commented 2025-06-30T07:49:48.98+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(246.4, 68%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJT%3C/text%3E%3C/svg%3E)
Jade-T
3,520
Reputation points Microsoft External Staff
Moderator
0 answers
Disabling NTLM authentication over HTTP in on-premises Exchange environments
I am using a Hybrid Exchange Server 2016 on-premises alongside Exchange Online, and all mailboxes have been successfully migrated to Exchange Online. My on-premises Active Directory (AD) is synchronised with Entra ID using Entra ID Connect. I want to…
Exchange | Hybrid management
2,321 questions
asked 2025-07-04T14:48:07.9933333+00:00
EnterpriseArchitect
6,161
Reputation points
asked 2025-07-04T14:48:07.9933333+00:00
EnterpriseArchitect
6,161
Reputation points
1 answer
Hybrid Migration from exchange 2016 to M365 cloud
I am migrating from exchange 2016 to m365 cloud. Hybrid mode. At one point, I was able to receive external and internal. but not send internally to on Prem. today, I cannot receive any email. I can still only email external, but not internal. i am…
Exchange | Hybrid management
2,321 questions
asked 2025-07-10T15:50:41.3533333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(291.2, 62%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESL%3C/text%3E%3C/svg%3E)
Scott, Laketa R
0
Reputation points
commented 2025-07-28T11:12:25.08+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(297.6, 3%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EVV%3C/text%3E%3C/svg%3E)
Vergil-V
2,115
Reputation points Microsoft External Staff
Moderator
1 answer
I had to rename a user account in active directory (sync in place). The primary email address won't change/update.
I had to rename a user account in active directory (sync in place). The primary email address won't change/update. Error: Email address type update failed Error: Error executing request. The operation on mailbox…
Exchange | Hybrid management
2,321 questions
asked 2025-07-23T22:07:17.1066667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(224.00000000000003, 44%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHB%3C/text%3E%3C/svg%3E)
Holly Baker
0
Reputation points
commented 2025-07-28T07:07:50.6566667+00:00
Jade-T
3,520
Reputation points Microsoft External Staff
Moderator