Solved

Older clients and Exchange 2016

Posted on 2016-11-21
5
30 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 6

Expert Comment

by:Andy
Comment Utility
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 17

Expert Comment

by:LesterClayton
Comment Utility
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 2

Accepted Solution

by:
Pune Tech earned 500 total points
Comment Utility
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
Comment Utility
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 6

Expert Comment

by:Andy
Comment Utility
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

Promote certifications in your email signature

Has your company recently won an award or achieved a certification? They'll no doubt want to show it off. Email signature images used to promote certifications & awards can instantly establish credibility with a recipient and provide you with numerous benefits.

Join & Write a Comment

Resolve Outlook connectivity issues after moving mailbox to new Exchange 2016 server
Exchange server is not supported in any cloud-hosted platform (other than Azure with Azure Premium Storage).
In this video we show how to create a mailbox database 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 Servers >> Data…
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…

744 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

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now