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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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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161 views

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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455 views

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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96 views

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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211 views

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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250 views

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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187 views

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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345 views

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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1answer
1k views

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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2answers
3k views

“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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419 views

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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523 views

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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605 views

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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17k views

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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1answer
528 views

How to setup out of office message for hibrid office environment using powershell?

Im searching a way to set "Out of office" message for a user who is in office 365/exchange hybrid environment via powershell. We have a exchange hybrid environment. (some users are in onpremis ...
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116 views

Exchange hybrid mode with mixed mailbox stores

I need to understand Exchange online in hybrid environment a bit better, so the question I have is if for example I have a hybrid environment with some mailboxes online and some on premise. If on ...
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57 views

Exchange hybrid mode mailbox stores

Could you please explain how and where are emails stored in Exchange online hybrid configuration after you move a mailbox from on premises server to online? I have a test environment and after I moved ...
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1answer
416 views

Certificate warning - Outlook connecting to local Exchange 2016 FQDN while autodiscover points to Exchange Online

The following is the environment: One Exchange 2013 and one 2016 server. The 2016 server is in hybrid mode. None of the the client access URLs point to the 2016 server FQDN. Autodiscover.domain.com (...
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How can I perform an hybrid multibox search on Exchange from Powershell?

I have to adapt a script that do "OnPromises" searches a hybrid context. I used the New-MailboxSearch cmdlet to implement this script. The script searches all the indicated mailboxes and copies the ...
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1answer
677 views

Exchange multi domains hybrid migration

I have an AD forest with 1 parent domain and 3 subdomains(A.lan, 1.A.lan, 2.A.lan, 3.A.lan). Azure AD Sync is configured and all accounts are synchronized. All domains have differents supplementary ...
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3answers
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SPF configuration on exchange hybrid

I am a newbie at Exchange hybrid configuration. I am struggling when I try to find an answer for the situation below. We have an Exchange Hybrid system and use Messagelab as the smart host for spam ...
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1answer
822 views

Possible to have a cloud primary mailbox with an on-prem archive mailbox?

I have a customer that wants to migrate their users primary mailboxes from Exchange 2016 to Office 365-Exchange Online but leave their archive mailboxes on-prem. I haven't been able to decipher what ...
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1answer
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Edge Transport Server missing from Hybrid Configuration Wizard

After initially running the Hybrid Configuration Wizard (but not migrating any mailboxes) we've since added an Edge Transport Server to our Exchange 2010 SP3 RU13 environment. The intention being to ...
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1answer
364 views

Exchange 2010 - Hybrid Office 365, need to update admin identity password

We have two on-premise Exchange 2010 servers, and one Exchange Online (O365 for Business). I've changed the password for our O365 Global Admin account (which is also used to connect the hybrid set-up)...
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3k views

Can I add existing AD groups to Exchange

We are using an Office365 Hyrbid deployment with Exchange 2016 on premise. The Hybrid setup was deployed after our users and groups were created and synced from AD, so they do not currently appear in ...
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451 5.7.3 STARTTLS is required to send mail Exchange 2013 Hybrid

Certificate from GoDaddy is in place, I have removed esmtp inspection from our Cisco ASA, and hybrid mail is flowing from Office 365 to our on prem Exchange 2013 server. When trying to send mail to a ...
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Adding Exchange 2013 to Existing 2010 Hybrid deployment Issues

We have a hybrid Exchange 2010 / Office 365 deployment and we are hoping to phase out the 2010 Server and replace it with Exchange 2013 CU11. I have followed the prerequisite details found here (...
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Is this a supported Exchange Hybrid scenario?

I have been battling with Office365 support on this case for a little while, as what they have been telling me is/isn't possible, contradicts the documentation they have directed me to. Some info: ...
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3k views

Exchange Hybrid send all mails via Exchange Online

We are running Exchange 2013 in a Hybrid Enviroment with Office 365 and we want to send all mails via Exchange Online. If we use the Outbound to Office 365 connector for all addresses (adding * at ...