Just to add the anecdata for the topic, I will confirm this.<p>I&#x27;ve traveled to Canada for one-week SharePoint teaching gigs and to present at conferences. One visit, I was teaching a class <i>for the government</i> and had a letter from the project leader describing the work done, the duration (one week) and how a non-citizen was chosen to do the work. I was held up in immigration for over an hour and almost sent back home.<p>Every other time I answered their queries about my visit honestly, I&#x27;ve been treated with varying levels of suspicion, from the &quot;ol&#x27; stink eye&quot; to almost being tossed out. And none of those visits were set to be longer than a week.