There seems to be some mystery around a technique called form digest. Mainly because developers will get errors complaining about an invalid security state of their request. I’ll try to explain.
Logging from a mobile device into SharePoint sometimes causes unexpected problems / behaviour. This has different causes, which I want to review here. There are probably more possible problems then I have encountered, so when you know any other goods tips when it comes to mobile use of SharePoint, feel free to leave a comment!