When configuring Integrated Windows Authentication (Active Directory) for ArcGIS GIS Server 10.5.1, if the domain account used for configuring the connection with the Active Directory has a special character in the password such as '<' or '>', the configuration cannot be completed.
Duplicate of BUG-000110546: This issue has already been logged in BUG-000110546.
解决办法
Change the password to not include the special characters of '<' or '>'.Further testing showed that Portal for ArcGIS 10.5.1 had a previous bug like this that has been fixed. If ArcGIS GIS Server is federated with Portal for ArcGIS, Portal for ArcGIS will be able to handle the use of a special character.