We want to create a Hybrid deployment between Exchange on-premises and Exchange Online. When we…
We have an Exchange 2010 to Exchange 2016 migration planned. Do you have Exchange 2010 in your environment? If you do, start migrating because Exchange 2010 is coming to an end. We did start migrating mailboxes from Exchange 2010 to Exchange 2016. After a mailbox is finished moving, email is not working on their phones and tablets. It’s working fine in Outlook and webmail. It’s interesting, why is it not working on the phones and tablets. How do we find a solution to this problem?
Table of contents
- How does the Exchange infrastructure look like
- What is the planning of the migration
- Find why ActiveSync MobileIron is not syncing after Exchange mailbox migration
- The solution to ActiveSync MobileIron not syncing after Exchange mailbox migration
- Why is ActiveSync MobileIron not syncing after Exchange mailbox migration
How does the Exchange infrastructure look like
First, we need to have a helicopter view of the organization’s infrastructure. The organization infrastructure contains:
- 4x Exchange Servers 2010
- 2x Exchange Server 2016
- 1x MobileIron
- 1x Load Balancer
What is the planning of the migration
The task is to:
- Migrate the mailboxes from Exchange 2010 to Exchange 2016 servers.
- Make sure that all the mailboxes are moved to Exchange 2016.
- Start uninstalling Exchange 2010 servers.
Find why ActiveSync MobileIron is not syncing after Exchange mailbox migration
Let’s reproduce the problem by following the steps:
- Make a test user mailbox on Exchange Server 2010. For example, firstname.lastname@example.org.
- Download the MobileIron application on your phone or tablet.
- Configure MobileIron by providing the settings and or credentials.
- MobileIron will install a profile. After that, it will configure the email email@example.com on the phone or tablet.
- Open the email application on your phone or tablet.
- Send and receive email from the email account firstname.lastname@example.org. All is working fine.
- Move the mailbox to Exchange 2016.
- Verify that the mailbox is migrated on an Exchange 2016 database.
- Load the mail application on the phone or tablet.
- Email is not loading new emails. The last connection was a couple of minutes ago. A message is showing “Cannot Get Mail, the connection to the server failed”.
The solution to ActiveSync MobileIron not syncing after Exchange mailbox migration
Log into the MobileIron Admin Portal.
Click Device & Users in the menu. Click ActiveSync.
Select the checkbox for the user that is having the email problem. For example, test2010.
Click the Actions button, a dropdown menu will show up. Click Remove.
Open the email application on your phone or tablet. Email is working again!
Why is ActiveSync MobileIron not syncing after Exchange mailbox migration
The devices (phones or tablets) with a mailbox that has been migrated from Exchange 2010 to 2016 are having problems. That’s because ActiveSync does not switch to the new ActiveSync protocol that Exchange 2016 uses. The negotiation between MobileIron and the ActiveSync device is using the ActiveSync protocol. The protocol that is being used is called “version negotiation“. Version negotiation will only take place during the first synchronization and no longer afterward. By removing the ActiveSync associations from MobileIron, the device will be forced to make a new negotiation. This time with Exchange 2016.
In this article, you learned that there can be problems when you have an Exchange 2010 to 2016 migration. First, get a helicopter view of the organization. Second, try to reproduce the problem. The last step, find the solution. The solution is to remove the ActiveSync associations from MobileIron. The device will make a new negotiation to Exchange 2016. Did you enjoy this article? If so, you may like the article Bulk create AD Users with random passwords. Don’t forget to follow us and share this article.