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One of our clients wanted to upgrade its email system and needed to complete the migration with as little downtime as possible. Since the client was still using Exchange 2003, Xantrion had to help them leapfrog over Exchange 2007 to Exchange 2010. That brought up a known issue. Other users migrating directly from Exchange 2003 to Exchange 2010 had reported that they could use Outlook Web Access to retrieve email from any browser, or they could use ActiveSync to access their email, calendars, and contacts from a smartphone, but they couldn't do both at once.
A typical Exchange migration project takes 40 hours. This one took 150, many of them on the phone with a senior Exchange specialist at Microsoft. But in the end, Xantrion found a way to give our client both webmail and mobile email.
Microsoft's pro told Xantrion it was only the second time anyone had been able to solve this particular problem. But it's certainly not the last time. Xantrion has documented the entire process in detail.