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.

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. A Microsoft Exchange hybrid deployment provides the seamless look and feel of a single Exchange organization between an on-premises Exchange organization and Exchange Online in Microsoft Office 365. In addition, a hybrid deployment can serve as an intermediate step to moving completely to an Exchange Online organization.

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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: [01/24/2021 17:30:48.0403] [2] [ERROR] Length…
allruiz
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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 MX record is pointing to the On-Premise Exchange…
Alfred
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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 in Exchange on-prem as an "Office 365" mailbox,…
confoundr
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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 Exchange from SBS 2011. The uninstall failed about…
keving98
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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. Inbound from Internet Internet --> Sophos Email Appliance…
Blue Tongue
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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 they were still on premises. Now that the…
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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 checked large item. It is around 40MB. So just above…
gamelton
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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 intermittently fail with NDR. The NDR is due to a hop…
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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 adding on-prem exchange to the mix. I have found…
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