Forum Discussion
SharePoint Designer Connection issue with SharePoint Online
Sajith G H Did you try first logging in to Office 365 through Internet Explorer and having it remember your credentials, then try opening SharePoint Designer?
When consulting, I often had to use SharePoint Designer with different admin accounts for various Office 365/SharePoint Online tenants. Windows and Internet Explorer will store/cache your SharePoint Designer credentials. I often would get prompted over and over for login information if the stored credential didn't match the tenant site that I was trying to connect to.
The easiest workaround I found was this:
1. Close SharePoint Designer
2. Open Internet Explorer
3. Go to your SharePoint Site in Internet Explorer being sure to login with the correct account and selecting the option for Office 365/SharePoint to remember your login.
4. Open SharePoint Designer and go to the relevant SharePoint site.
Due to some reason, IE is having issue in Windows Server 2016. So we are using firefox as default browser. We can login into the SharePoint Online from the firefox browser. SharePoint Designer is unable to access.
I still think it has something to do with stored credentials. I would try going into the Credential Manager in Control Panel and removing anything Office 2013 related, then trying to open and login to SharePoint Designer again.
- Coming back after three years with nowadays findings:
1. enable custom script
2. enable access for apps for old auth method
3. remove credentials in Windows (credentials manager) related to office
4. put sharepoint online site link into sharepoint designer 2013 pop up window once you click on "open site"