At the moment I am using SharePoint 2013, but by the end of the year we will be migrating over to Office 365. We have a Office 365 tenant at the moment and I am just getting to know the feel of it. I tried to open some sites with SharePoint Designer, but get this message ‘The folder name is invalid’, I have seen this message before with on premise when leaving in the ‘Pages/Home.aspx’ and not just using the site. I have checked in the site collection and it is set to allow SharePoint Designer, also exhausted Google Search but with no avail. In my last job I done some work on Office 365 and had no problems when creating workflows, so I am not sure what could be causing this problem. Any help would be appreciated.
Can you describe a bit what you are migrating and why you need SharePoint designer? In Office 365, especially if you are going to be adopting modern… the use of SharePoint Designer in some scenarios isn’t supported (in Modern). If you are creating workflows, you should look into exploring Microsoft Flow instead of using SharePoint Designer workflows.
