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Mark Dobrzynski's avatar
Mark Dobrzynski
Copper Contributor
Nov 07, 2016

Migrating On-Prem Distribution Groups to Exchange Online in Hybrid Mode

I have come across a number of articles on migrating distribution groups to Office 365 when you're not in hybrid mode. My situation is having hundreds of DLs on my on-prem Exchange environment that I...
exchange
hybrid
office 365
On-Premises
Boe Dillard's avatar
Boe Dillard
Iron Contributor
Jul 24, 2019

TonyRedmond Thanks - that is the article I was looking at.  I opened a case with MS but he got distracted by something else.   He seemed to think since it was synced I shouldn't worry about it which might be valid but I'm trying to avoid the day that their exchange server stops working and it depends on anything that is on prem.    I'll open another case. 

 

I did get this command to find out if it is Mastered on Premise or hosted in office 365

get-recipient -identity dlname@yourdomain.com |FL

 

The ones I'm upgraded are groups I created in Exchange.   I wonder if those eligible ones (ones I don't see any of) are ones people created in their outlook.

  • jayrod's avatar
    jayrod
    Copper Contributor
    Feb 18, 2021

    Boe Dillard Synced from AD are not eligible. They have to be copied to the cloud and deleted onprem.

  • Offsinnerd's avatar
    Offsinnerd
    Copper Contributor
    May 14, 2020

    djreit  I am going to try your method and see if this works for me. I'm at the same spot as everyone else on this thread. Please don't let this die. This is more involved than it seems. Sorry, I'm a newbie when it comes to MS Exchange so I'm learning this on the fly.

     

    We are in a hybrid set up. Trying to take existing DLs on our on-prem environment to O365. While we aren't doing away with our on-prem environment any time soon, DLs must be in the cloud soon so users can have the ability to manage them again as they did prior.

     

    Anything learned since the last post is greatly appreciated.

  • djreit's avatar
    djreit
    Copper Contributor
    Feb 25, 2020

    Reading through the posts here is some short code as I understand the process of migrating an OnPrem DL to a Cloud DL:

    OnPrem

    1. Get the x500 LegacyExchangeDN from the DL

    2. Get the members of the DL

    3. Remove the DL

    Cloud

    1. Create the DL

    2. Add Members to the DL

    3. Add Alias x500 equal to the LegacyExchangeDN from above

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