[ngw] O365/GroupWise hybrid

Elbert LaGrew Elbert.LaGrew at katun.com
Mon Feb 23 18:49:27 UTC 2015

Thanks David....It's worth a look!

>>> On 2/23/2015 at 12:43 PM, in message <54EB2E7E020000CB00058B13 at donald.lakeheadschools.ca>, "David McQueen" <david_mcqueen at Lakeheadschools.ca> wrote:

This may be what you are trying to do:


It's called dual delivery.  I remember having this setup with and Exchange and Google, but I haven't tried with GroupWise and O365, but after a quick read, this looks promising.

David McQueen I.S.P., ITCP
Senior Information Technology Specialist
Lakehead Public Schools
Jim McCuaig Education Centre
2135 Sills Street
Thunder Bay, Ontario   P7E 5T2
(807) 625-5137


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   >>> "Joe Acquisto-j4" <joea at j4computers.com> 23/02/2015 1:29 PM >>>
But how is that going to deliver to o365 *with the same original domain* ?

>>> Bob Jonkman <bjonkman at torontohydro.com> 02/23/15 1:24 PM >>>
Could be done by putting something like Postfix as the receiver for all mail, then doing an LDAP lookup of the recipient mail address in GroupWise.  If the address exists, then deliver to GW. If the lookup generates an error then deliver to O365.

But now you're looking at maintaining three separate mail routing systems (although only two mail repositories).

And then there's the migration of the messages and calendar items from GW to O365 for the test users.  And back again, if the test results come back negative.


Bob Jonkman mailto:bjonkman at torontohydro.com
Toronto Hydro GroupWise Operations Support
Phone: +1-416-542-3100;ext=30237
Cell: +1-416-903-0083

-----Original Message-----
From: ngw-bounces+bjonkman=torontohydro.com at ngwlist.com [mailto:ngw-bounces+bjonkman=torontohydro.com at ngwlist.com] On Behalf Of Elbert LaGrew
Sent: Monday, 23 February 2015 11.24
To: NGWList
Subject: [ngw] O365/GroupWise hybrid

Good day Listers,

My manager wants to make a test O365/GroupWise hybrid system.

Currently we our main domain's email  is katun.com

We have many sub-domains, like argentina.katun.com, germany.katun.com, etc.  However, everyone is valid with katun.com as their email address in GroupWise.

What he wants to do is set up a test with O365 and put regular users into that environment, but he doesn't want to have to change the email address at all...he wants it to remain Fname.Lname at katun.com.

Is that even possible?  I would have thought the test users would have had to have a new domain for an address, like Fname.Lname at someotherdomain.com

Does anyone have any experience with this type of setup?  Hints?

Thanks in advance!

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