仍然指向前雇员的登录信息，因为两个用户都使用相同的凭据

我在SharePoint中的用户帐户有问题.与前雇员用户名冲突，因为两个用户具有相同的用户名.我们从AD删除了离开公司的旧员工用户ID，但是当新用户使用相同的凭据登录时，该ID仍然存在 使用旧员工凭证登录，我们可以查看旧员工的个人资料信息.我试图迁移用户，设置用户没有任何帮助.解决此问题的方法是什么?

i am having issue with the user account in SharePoint. Conflict with the ex-employee user name because both users have same user name. we deleted old employee user id from AD who left the company but still when new user login using same credential she is login with old employee credential and we can see profile info for old employee. i tried to migrate user, set user nothing helped. What is the way to resolve this issue?

感谢进阶！