Excel公式，在字符串中查找OU=的第一个实例，并删除前面的任何字符

I have 1000's of strings similar to "CN=Joe Smith,OU=Students,DC=Domain,DC=Edu" and I want to find the first instance of OU= and remove the characters before it leaving me with "OU=Students,DC=Domain,DC=Edu". How can I do this with an Excel formula?I have 1000's of strings similar to "CN=Joe Smi