Remarks: Commas that are not used as separators in distinguished names must be escaped with the backslash ("\") character ...

Remarks: Commas that are not used as separators in distinguished names must be escaped with the backslash ("\") character (for example, "CN=Company\, Inc.,CN=Users,DC=microsoft,DC=com").  Backslashes used in distinguished names must be escaped with a backslash (for example, "CN=Sales\\ Latin America,OU=Distribution Lists,DC=microsoft,DC=com").