Solved

Exchange '10 ActiveSync External Access, How to Lock Down to LAN-Only?

Posted on 2013-07-01
6
494 Views
Last Modified: 2013-07-03
By default I believe that ActiveSync is enabled in Exchange '10 (SP3 Ent), as well as for all newly created users, which is fine. We have a third-party solution that will be relaying e-mail and phone policies via ActiveSync and so we do not need to expose ActiveSync out to the Internet, nor would we like to. Presently only OWA is published externally over SSL.

What would be the best way to lock down ActiveSync to only internal LAN use?
0
Comment
Question by:RTM2007
6 Comments
 
LVL 23

Expert Comment

by:Stelian Stan
ID: 39291878
You could disable ActiveSync for all users an then enable just those users you want to have ActiveSync enabled.
get-Mailbox -resultsize unlimited | set-CASMailbox -ActiveSyncEnabled:$False

Open in new window


To enable a set of users in the text file:
Get-content C:\users.txt | set-CASMailbox -ActiveSyncEnabled:$True

Open in new window

0
 
LVL 23

Expert Comment

by:Stelian Stan
ID: 39291884
0
 
LVL 76

Expert Comment

by:Alan Hardisty
ID: 39292319
Activesync is either enabled for a user or disabled.  If you want to restrict it to the LAN only, you will have to close port 443 on your Firewall so that it can't communicate, but then you will also lose Outlook Anywhere too.

You could setup Activesync to use a different FQDN that externally doesn't resolve anywhere or resolves to an invalid IP Address, but internally does.
0
Do email signature updates give you a headache?

Constantly trying to correctly format email signatures? Spending all of your time at every user’s desk to make updates? Want high-quality HTML signatures on all devices, including on mobiles and Macs? Then, let Exclaimer solve all your email signature problems today!

 
LVL 2

Author Comment

by:RTM2007
ID: 39294989
Is it possible to lock down/restrict ActiveSync via IIS?
0
 
LVL 76

Expert Comment

by:Alan Hardisty
ID: 39295040
In what way?

What do you want to allow / disallow?
0
 
LVL 63

Accepted Solution

by:
Simon Butler (Sembee) earned 500 total points
ID: 39296439
You can use Access Restrictions on the Microsoft-Server-ActiveSync virtual directory to block access from the internet. Just ensure that you allow your entire internal subnet access.

Simon.
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

Resolve Outlook connectivity issues after moving mailbox to new Exchange 2016 server
Learn to move / copy / export exchange contacts to iPhone without using any software. Also see the issues in configuration of exchange with iPhone to migrate contacts.
To show how to generate a certificate request 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 >> Certificates…
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…

757 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

20 Experts available now in Live!

Get 1:1 Help Now