Outlook 2010 Cached Mode & Gateway-to-Gateway VPN Connection.
Posted on 2013-06-26
I have a dilemma with a client that has multiple office locations connected via dedicated VPN connections (gateway-to-gateway). When they (approx. 5 people) travel to the remote offices (once or twice a week), they complain of the latency connecting to the main office via Terminal Services. At the main office there are no latency problems. The Internet connections at the remote sites are high bandwidth connections 15/5mbps, and the main office has a 50/15mbps connection. So the Internet connections are adequate to work efficiently regardless of office location.
The problem arrises when these users travel with their tablets and company issued Android phones at remote office locations. Each remote location has wireless access to accommodate their phones and tablets. By doing so it cuts down on the company data plan usage. So its a cost savings on the plan, but also affecting network bandwidth.
The tablets are configured with Outlook 2010 Cached Mode, and as soon as Outlook is open it automatically starts syncing all items, and then afterwards as mail with attachments is sent and received the traffic seems to continue saturating the VPN connection. I am basically saying, the users are noticing performance degradation issues while working in remote offices.
I have setup ActiveSync to download headers to help reduce the syncing of attachments. However, Outlook 2010 Cached Mode connected to an Exchange Server 2010 does not seem to have a throttle to download headers to cut down bandwidth consumption.
I was going to propose an additional Internet connection with a wireless router so that the phones and tablets can connect to so that ActiveSync and Outlook Cached Mode traffic have a separate dedicated Internet connection and not interfere with the dedicated VPN connection used for Terminal Services, VOIP connections, and at times remote printing.
The client's laptops and phones work seamlessly when at home or other locations, and they will not like the idea of having to make changes on their phones and/or tablets when traveling to remote office locations. I am hoping there is another way to skin this cat! Any suggestions other than disable wireless access at the remote locations so their tablets and phones can't connect?