When migrating from SharePoint on-premises to SharePoint Online/Office 365, you may find that some users have a checked-out file called `spcommon[1].png`. If you ask users about it, they’ll have no idea what you’re talking about.

As it turns out, this isn’t a bug. It is possible for users to check-out this file without knowing they did it.

People don’t always find content by searching. For example, if you’ve ever tried to find something but didn’t know what keyword to use in your search query, you’ll appreciate how challenging it can be. Find the 3 ways users find content and how your Information Architecture can help people find what they need — even when they don’t know what they’re looking for.

In software projects, we have a tendency to repeat the same mistakes over and over again.

Stakeholders ask for estimates. Usually something along the lines of “we don’t know what we want. When can you have it done and how much will it cost?”.

Find out how the cone of uncertainty and agile planning can help you answer these questions and help you break that endless cycle of pointless estimates.

A while ago, I wrote an article describing how you can inject a custom CSS stylesheet on SharePoint modern pages using an SPFx application extension. The code sample is now part of the SharePoint SP-Dev-Fx-Extensions repository on GitHub.

Since the article, I have been getting tons of e-mails asking all sorts of questions about the solution.

Since SPFx 1.6 was released, I took the opportunity to upgrade the solution to the latest and greatest version of the toolset. You can find the latest code on GitHub, or download the latest SharePoint package.

In this post, I’ll (hopefully) answer some questions about how to use it.