SharePoint [Study Notes]-Windows verification logon box is frequently displayed on the Sharepoint client.

Scenario: SITE staff usera creates a task and assigns the assign to userb. Userb receives an email notification from the task list. At this time, usera finds that the assign owner is wrong, re-modifies the task item, re-signs the task to another user userc, and revokes the access permission of userb. Userb reports that after outlook is opened every day, the Windows Authentication logon box pops up, asking for logon, and the window still pops up after entering the box multiple times.

Solution: Ask the user to check whether the task in outlook is assigned by assign from the task list in Sharepoint, when receiving the mail, he will also synchronize tasks in his outlook task, while usera re-assigns the task assign to userc, the tasks of userb in outlook are not automatically deleted. This task will automatically access the SharePoint site. Because the permissions of userb have been revoked, the Windows logon box will pop up frequently. Manually delete this task from outlook to solve this problem.