the set of folders cannot be opened the attempt to log on to Microsoft exchange has failed
Issue : Error in outlook: the set of folders cannot be opened the attempt to log on to Microsoft exchange has failed. Owa is working fine, Autodiscover and MAPI configured correctly. Reason: the machine was logged in by local user. Solution: Made the machine domain joined and logged in as domain user: -In search bar Type sysdm.cpl and press Enter . - click change. - select the domain option and ender the domain address. - then login and restart tested outlook then, it worked. Other Information: - Checked Autodiscover setting. - Used fiddler and it showed Https 200 status in Autodiscover and fiddler. - Pinged the server, it worked. - Created new Profile and tried outlook in Safe mode Outlook.exe /safe and also Outlook.exe /resetnavpane - also tried to open Outlook.exe /resetfolders