Questions tagged [exchange-hybrid]

An Microsoft Exchange hybrid deployment offers organizations the ability to extend the feature-rich experience and administrative control they have with their existing on-premises Microsoft Exchange organization to the cloud.

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Exchange Hybrid Intermittently giving NDRs

New year, looks like a pretty active site. My company has a Hybrid config in place that cannot be removed at the moment. Since the 22/04 we have been having problems that certain domains ...
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Exchange 2010 Minimal Hybrid in place : Migrate or Decom?

I'm trying to understand the best approach with an Exchange 2010 Server with a minimal hybrid configuration. All is migrated to the cloud, the current Exchange 2010 is not in prod, but some mailboxe ...
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Exchange 2016 Hybrid for AD management only

History - 2010 Exch used to migrate all mailbox to O365 in 2013. Been 100% Exchange online since 2013. No mailboxes on prem, no shared mailboxes, no nothing. CAS attritubute set to Null. No SMTP. ...
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MS Azure AD connect & Exchange hybrid deployment

I have a MS Small Business Server 2010 server with Exchange. We have looking to migrate to O365. I deployed a new Windows 2019 server (the SBS machine's UI was painfully slow) and promoted that to the ...
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Steps to update certificate in edge servers

Onprem mailbox servers is in exchange 2013 and edge servers in dmz. Can someone please share the steps to renew third part cert in edge servers. I am unable to find a ms article. Please help
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Outlook Calendar can display details but scheduling assistant can't even show free/busy after EXO migration

While all our end user mailboxes are still on our on-prem Exchange 2016 environment, I have moved a few room mailboxes to EXO. When I view these mailboxes in the calendar view in Outlook, I can see ...
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Reverse hybrid exchange: concerns with adding new on-prem exchange to existing 365 hosted exchange environmnet

I am curious to know if there are any major gotchas with setting up a 'reverse hybrid' 365 deployment, where all mail flow is already in the cloud with on-prem ad sync already enabled and simply ...
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Exchange 2010 on prem to hybrid

I'm in the middle of an Exchange 2010 to hybrid Exchange Online migration and I think that I have a problem... I'm alone with this and I'm getting the knowledge reading the Microsoft documentation. I ...
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Exchange Server 2016 - identify full hybrid and/or minimal hybrid using or not

We have 2 Exchange Server 2016. I want to check it if I am using Full Hybrid and / or minimal hybrid in our environment. What should I understand from the following output? get-hybridconfiguration ...
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In an Exch 2016/EXO hybrid deployment, should a telnet message test on prem be considered internal

I have inherited a hybrid deployment between Exchange 2016 on prem and Exchange online. One of the first things I had to do was turn of centralized message transport, as it was adding two unnecessary ...
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Exchange 2013 Hybrid EAC not seeing mailboxes in a second domain

We have a hybrid setup. I have a situation where certain users are not showing up on the local on-prem Exchange 2013 server under recipients. We have two domains in our single forest. I will call our ...
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Exchange 2019 To replace Exchange 2013 in Hybrid Environment

After the recent Exchange Vulnerabilities were announced, we disconnected our Exchange 2013 server in our hybrid configuration and investigated any impact. There was none, but it has been decided that ...
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Having Trouble with Exchange Archive Errors - 365 Hybrid

I work in a hybrid 365 environment. Someone made some changes to the archives for users' mailboxes and now I'm getting errors in 365 admin center when I look at an active user:image of error box I was ...
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Hybrid Exchange - 3 step deprovisioning necessary when using archive

The Microsoft documentation for the Disable-RemoteMailbox powershell cmdlet states: Note: If you are deprovisioning a cloud mailbox and its associated online archive, you must first disable the ...
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Exchange 2013 with failed prepad execution leading to management groups with no roles asigned

A former sysadmin deleted several groups, included Exchange Management Security Groups. Ir order to repair his error, he tried to execute prepad. Prepad didn't execute correctly ending with this error:...
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On-premises users aren't getting email messages from Office 365 users

The DNS name of the Exchange 2013 server is servername.abc.local I setup a Hybrid Environment with the Public domain xyz.nl The UPN suffix of the abc.local domain is xyz.nl and I updated al users. The ...
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Exchange Hybrid, Issues with a Single User Account

We have a single user that was not created correctly in Exchange on-prem. This is causing issues with SMTP mail not routing/failing to deliver to the o365 email. In our environment, users are created ...
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On-premesis Mailboxes are Not Linked to Office 365 Mailboxes in Hybrid Exchange

I recently replaced a SBS 2011 PDC with a Server 2019 PDC. The migration went smoothly. A few years before that I switched over to Office 365. Instead of just leaving it be, I tried to uninstall ...
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O365 Hybrid: Can we select certain OUs and mailboxes to migrate instead of the whole forest?

This is probably a dumb question to ask. 1) When we do the Azure Active Directory Connect to synchronise on-premises Active Directory, can we just select a particular OU which stores all active staff ...
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O365 Hybrid and Sophos Email Appliance

I am planning to migrate our Exchange 2010 SP3 server to O365 using Hybrid environment. We also use Sophos Email Appliance which is a box sitting inhouse. Currently, the mail flows like this. ...
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Exchange 2010 hybrid Unable to change max receive size

I have Exchange 2010 and Office 365 set up in full hybrid mode. I have migrated some mailboxes over and mail flows as expected. Some of the mailboxes had a non default Receiving Message Size set while ...
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Exchange Hybrid message size restriction

I'm migrating mailbox to Office 365 and got stuck with Large Items Exception. I read about default message size restrictions. And set 100MB limit in Exchange Online. Then migration failed again. I ...
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HCW8078 Hybrid Exchange Error

I did a fresh install of DC1 DC2 and Exchange so I'm not sure why I am getting errors still. https://imgur.com/a/16IEtyh
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Exchange 2019 - Cannot send external mail

I have a domain and wild card cert installed. Currently I can login to https://mail.advsystems.com/owa/ I can send mail internally and receive mail internally. I can't receive mail from an ...
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Double Booking Issue on Exchange Room Resource

I am working on a double booking issue where Room calendars appear to be allowing meetings to be booked at the same time as other meetings. The calendars themselves seem to have the correct settings, ...
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Adding a new mail alias and need to sync existing

We have a secondary mail/web domain that has its own mail running through postfix and it is just being forwarded to the primary mail/web domain on exchange and O365. We want to add all of the email ...
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O365 Skype for Business Admin User list not displaying all domain users

We recently finished migrating on-prem exchange 2010 mailboxes to O365 in a hybrid environment (still existing) and are now exploring O365 functionality, including Skype. Half of the company is ...
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Office 365 migration where AD domain name is different to email domain name

My present environment is such that the AD domain name is abc.com while the Exchange 2010 email address domain names are @abc.com with @xyz.com as the reply to address. We want to use xyz.com and @...
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Exchange Online Hybrid Public Mail Folder not found

We are currently running Exchange 2016 on premises with modern public folders. We are migrating to Exchange Online using a full hybrid configuration since the migration will take a few weeks. I am ...
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Some Office 365 users unable to receive emails with attachments. Both internal and external sources

We have recently migrated our Mail service from an On-premise Exchange 2010 server to an Office 365 subscription. It's currently a hybrid solution but we plan on decommissioning the 2010 server in the ...
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Exchange Hybrid SMTP High Availability

I have been asked to setup exchange hybrid but I must have 2 Exchange Hybrid servers handling mail flow and mailbox migrations. Is it possible to deploy 2 Hybrid servers that are load balanced and ...
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Public Folders company setup are not showing for migrated users in E2010/O365 hybrid environment

We have a hybrid environment setup between Exchange 2010 and O365 for both mailboxes and Public Folders. Since putting Public Folders in hyrbid mode (with Public Folders beta turned on in Azure AD ...
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Figure out which Public Folder AD attribute is being shared with another object

We have a hyrbid environment setup between Exchange 2010 and O365 for both mailboxes and Public Folders. Since putting Public Folders in hyrbid mode (through use of https://docs.microsoft.com/en-us/...
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AltRecipient AD attribute on mail enabled Public Folder cannot be synchronized in hybrid environment with O365

We have a hyrbid environment setup between Exchange 2010 and O365 for both mailboxes and Public Folders. Since putting Public Folders in hyrbid mode (through use of https://docs.microsoft.com/en-us/...
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Run Sync-MailPublicFolders with backticks in Powershell command line

I'm trying to run: ``` Sync-MailPublicFolders.ps1 -Credential (Get-Credential) -CsvSummaryFile "sync_summary.csv" ``` from https://docs.microsoft.com/en-us/exchange/collaboration-exo/...
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Separate namespace for Exchange hybrid servers

I read somewhere that you could do the following hybrid deployment. 1) Two dedicated Exchange 2016 "hybrid servers" that are F5 load balanced 2) Create a new namespace called hybrid.contoso.com. (...
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Exchange 2010 to O365 Hybrid - Keep Public Folders changable

The company I am performing an Exchange 2010 to Office 365 migration for has public folders. We planned to perform the migration while the two systems are in hybrid mode, over the course of several ...
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Strange: Users can't delete items from public folders in Outlook 2016 when the client has been logged in for about 30 minutes

We are running Exchange Online and Exchange 2013 in hybrid mode. Our public folders are hosted online. After a fresh boot/reboot, our users can delete items (permissions vary from Owner to ...
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How to disable EOP for the whole organization in our exchange hybrid environment?

set-MailboxJunkEmailConfiguration -enabled $false only disable the EOP for mailboxes. it cannot ensure new mailbox's EOP is also disable. So what is the solution? Thanks.
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What happens when you re-run the Office365 Hybrid Configuration Wizard in an environment that is already setup?

Existing Infrastructure was an Exchange 2010 + Office365 Hybrid Configuration with all mailboxes hosted in Office365 which was configured months back. If we run the Hybrid Configuration Wizard again ...
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Which server to choose in Hybrid Configuration Wizard when adding new Exchange2016 server into existing Hybrid Environment with Exchange 2010?

Current environment has an on premises Exchange 2010 server configured in Hybrid Mode with Office365 with all mailboxes hosted within Office365. We just installed an Exchange 2016 server into the ...
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If a Contact is Created in AD, Will that Cause the Creation of a Contact in Exchange?

If a contact is created in the AD, will it automatically be created in Exchange as well? Windows Server 2008 R2 environment On-premise Exchange 2010 hybrid with O365 Exchange is on secondary DC AD ...
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"Relay Access Denied" error when trying to use Office 365 as mail relay

I redirect outgoing emails in my organization to my postfix MTA. from there, i'm redirecting the mails to office 365 for relaying to the original recipients. For external recipients, I get the ...
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OU Name with 'slash' in title "suddenly(?)" rejected by Exchange 2013/0365 Hybrid

We recently migrated from Exchange 2007 to 0365 Hybrid with a 2013 server on-prem. I'm reasonably sure I've made changes to users in the 'Web/IT' OU since the migration and not run into this error, ...
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How to manage individual mailbox of the batch migration?

I tried to migrate 4 mailboxes in a batch migration with 'manually complete' is on. When the synchronization is done, I noticed 1 of them is failed, I know how to fix the failed box. But the question ...
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In a hybrid exchange environment, how to send email from a mailbox in exchange on-prem to another mail box in exchange online?

We deploy hybrid exchange using the HCW, AADC has been deployed as well. Mailbox A is created on exchange online. Mailbox B is created on exchange on-prem. Now I can send an email from A to B. But I ...
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Is ADFS a must-have, when you deploy hybrid exchange server?

With AADC implemented in our AD and Office 365, we want to deploy a hybrid Exchange next, is ADFS a must? Thanks!
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Error message on exchange server with hybrid setup to Office365

Hybrid setup between Exchange 2016 and Office 365, 50% of the of the users are migrated to Office 365 and currently no problems reported. A few months later (today) I discovered this error message in ...
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Exchange hybrid mail flow [closed]

I have successfully installed and configured exchange 2016 for a hybrid setup in my organization mail flow is up and running for all scenarios except from on-premises to o365. Every other flow works ...
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how to backup/export office 365 email to pst in exchange hybrid environment?

We have a exchange hybrid environment. (some users are in onpremises exchange and some users are office 365. ) When we want to export emails from onpremis we use , below command to export mail box ...
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