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Nerv0uS-2948 asked joyceshen-MSFT commented

[EXCHANGE 2010-2016] Which OWA URL will be displayed

Hello everyone,

Which OWA URL will be displayed :


  • User's mailbox moved to 2016

  • User's mailbox remains on 2010

Technical :

All EXCHs are in DAG (1 DAG for mbx 2010 and 1 DAG for mbx 2016)

EXCH 2010 = CAS/HUB

EXCH 2010 = 2 MBX

EXCH 2016 = 3 CASES (all roles)

EXCH 2016 = 3 MBX

So, coexistence mode.

For me, the user will have the OWA 2016 in all cases displayed first.

Then once logged in, if his box is under 2016 he stays under OWA 2016, if his box is under 2010 then the OWA 2010 URL is displayed.

Thanks for the clarification. :)

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joyceshen-MSFT answered

Hi @Nerv0uS-2948

Check the configuration for Exchange coexistence mode below:
204810-image.png

And the DNS:
204818-image.png

Then Exchange 2016 can proxy the request to 2010

Detailed information can be seen here: Client Connectivity in an Exchange 2016 Coexistence Environment with Exchange 2010


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Nerv0uS-2948 answered joyceshen-MSFT commented

Hi, @joyceshen-MSFT

Thank's for you answer.

Technically, i have already informations about the proxies requests from exch 2016 to 2010.

But, which URL will be displayed when the users will browse https:\\webmail.domain.com/owa ?

--> EXCH 2010 mailbox user --> Show OWA URL 2016 (blue) --> Login --> Then show OWA URL 2010 (orange) --> Right ?
--> EXCH 2016 mailbox user --> Show OWA URL 2016 (blue) --> Login --> Then show OWA URL 2016 (blue) --> Right ?

URL show depend of the mailbox user location only ?


OWA EXCHANGE 2010 :

205027-image.png

OWA EXCHANGE 2016 :

205033-image.png

Thank's a lot,





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Hi,

Yes, you're right. It depened on the mailbox located server version.

The proxy behavior only works from high level Exchange to older.

When you access the https://webmail.domain.com/owa
You will firstly get the 2016 OWA login page. Then you log in. If the mailbox is on Exchange 2010, OWA proxies and you will get 2010 OWA. Otherwise you get the 2016 interface.


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