We've got a client with an odd Exchange ActiveSync issue.
Here's the setup:
VMWARE ESXi host running two Windows Server 2012 R2 guests. One is a DC, the other runs Exchange 2013.
Their internet connection is dual-link of two ADSL lines (managed by a Cisco Meraki firewall) with static addresses to allow redundancy if there's an outage (which surprisingly hasn't occurred yet).
The staff all use their smartphones to access their office mailboxes using ActiveSync. On a regular basis, all of the phones have errors connecting to Exchange. The only fix is to remove and re-add the account.
This is cross-platform on Android and IOS.
Is there some kind of ActiveSync timeout, or the like in Exchange 2013?
Any help/advice would be appreciated, thanks.