Why is my MSPL application not seeing some messages?

MSPL (and its managed cousin, which goes by various names) is an extremely powerful tool for customizing Lync Server routing behavior. It can also, at times, be extremely frustrating to troubleshoot, partly because of the complexity of tinkering with the way Lync routes messages, and partly because the debugging tools we’re accustomed to for most .NET development are unavailable with MSPL. One of the most common frustrations I hear from people working with MSPL development is that messages that the script should be picking up and handling are just not going through the script at all. They’re visible in SIP logs, they’re obviously there, but your script somehow doesn’t see them. This post is my attempt to summarize a few of the most common reasons this can happen, and what you can do about it. Continue reading “Why is my MSPL application not seeing some messages?” »

UCMA and Office 365

A question I’ve been getting more and more often recently is whether UCMA applications can be made to work with Office 365 (Lync Online), and, if so, how. The short answer is no: a UCMA application can’t register against Lync Online. But if you need to get a UCMA application working with users on Lync Online, it’s worth looking at a couple of alternatives that may be palatable.

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