Solved

Older clients and Exchange 2016

Posted on 2016-11-21
5
63 Views
Last Modified: 2016-11-29
Hello all,
I'm about to migrate our Exchange 2010 servers to 2016, but wondered about something. I read that versions of Outlook older than 2010 SP2 (with hotfix) can't connect to Exchange 2016 (see at the bottom of https://technet.microsoft.com/en-us/library/aa996719(v=exchg.160).aspx). Is this true only if the user's mailbox is hosted in an Exchange 2016 database, or even if the mailbox is stored in the old 2010 database?

In other words, can older clients, like Outlook 2010 (no SP installed) connect to a mailbox stored in Exchange 2010 through Exchange 2016?

Thank you so much for your answers!
0
Comment
Question by:sysUA
5 Comments
 
LVL 7

Expert Comment

by:Andy
ID: 41895551
Hi,

As per the article, and as the clients will go via Exchange 2016 then, unfortunately, the only Supported clients are:
Outlook 2016
Outlook 2013
Outlook 2010 with KB2965295
Outlook for Mac for Office 365
Outlook for Mac 2011

So as long as you have KB2965295 installed (if you have WSUS just push it out if not already done!) then you should be fine.
1
 
LVL 18

Expert Comment

by:LesterClayton
ID: 41895556
If Exchange 2016 becomes your CAS (Client Access Server), then you will no longer be able to access the mailbox, unless you are running Outlook 2010 with SP2 and KB2965295 or Outlook 2013/2016.  It doens't matter that mailboxes are on an older server - the Client Access Role is the important factor here.  Clients connect to the Client Access Server, and it in turn speaks to the mailbox databases. Clients don't talk to the mailbox database directly.
1
 
LVL 3

Accepted Solution

by:
Pune Tech earned 500 total points
ID: 41895595
Exchange Server 2013 or 2016 continues to proxy the autodiscover request to Exchange Server 2010. Only you need to recycle the Autodiscover application pool on the 2016 server then the client will connect properly.

So older client outlook 2010 will be able to connect to exchange 2010 & 2016 servers without any issues.

Also refer following post

https://www.reddit.com/r/exchangeserver/comments/48b28n/outlook_2016_connectivity_issues_after_migration/
1
 

Author Comment

by:sysUA
ID: 41895774
Alright, after that last answer I went looking for a device with Outlook 2010 (SP1) and it was able to connect just fine after adding entries for mail and autodiscover to the hosts file pointing to the IP of the Exchange 2016 server. Which by the way is quite odd, given that MS states this old client shouldn't be able to connect at all. I will do some more testing though, but it's looking good.
0
 
LVL 7

Expert Comment

by:Andy
ID: 41895778
I would be careful with that approach as you never know if/when it will not work.
It may work for now but it's much better and highly advisable to get the clients up to date otherwise you could find yourself in trouble after a future update.
1

Featured Post

Does Powershell have you tied up in knots?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Exchange Powershell Help 3 32
exchange2007 4 20
Exchange, calendar 1 31
iCalendar Not Syncing With Office 365 Account 2 22
Local Continuous Replication is a cost effective and quick way of backing up Exchange server data. The following article describes the steps required to configure Local Continuous Replication. Also, the article tells you how to restore from a backup…
This article lists the top 5 free OST to PST Converter Tools. These tools save a lot of time for users when they want to convert OST to PST after their exchange server is no longer available or some other critical issue with exchange server or impor…
To show how to create a transport rule in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Mail Flow >> Rules tab.:  To cr…
The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…

786 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question