Untitled

Am not sure how to pass OU name to a variable in HTML.

        Below is my HTML code:
        <!-- DetailsForm -->
        <body>
          <div class =Welcome to Active Directory user portal</div>
          <form action="/user_creation" method="POST">
             <fieldset>
                <legend>Kindly Enter Details to Create User</legend><br>
                   <input name="Organizationalunit" type="text" value="" placeholder="OrganizationalUnit" required/><br><br>

                   <input name="First-Name" type="text" value=""  placeholder="First-Name" required/><br><br>
                   <input name="Initials" type="text" value=""  placeholder="Initials" required/><br><br>
                   <input name= "Password" type="text" value="" placeholder="Password" required /><br><br>
                   <input name="Display-Name" type="text" value="" placeholder="Display-Name" required /><br><br>
                   <input name= "Email"   type="mail" value="" placeholder="Email" /><br><br>
                   <input type="submit" value="Proceed" />
              </fieldset>
            </form>
        </div>
        </body>

@app.route('/user_creation',methods=['GET','POST'])
        def user_create():
            if(request.method=='POST'):
                OrgU=str(request.form['Organizationalunit'])
                FirstName=str(request.form['First-Name'])
                Initial=str(request.form['Initials'])
                Password=str(request.form['Password'])
                DisplayName=str(request.form['Display-Name'])
                Email=str(request.form['Email'])
                pyad.set_defaults(ldap_server="XXX.com", username="DomainXXXX", password="123")
                ou = pyad.adcontainer.ADContainer.from_dn("OrgU")
                new_user = pyad.aduser.ADUser.create("FirstName", ou, password="Password")
                if(new_user):
                    #flash("user created successfully")
                    user=pyad.from_cn("new_user")
                    user.force_pwd_change_on_login()
                    user.update_attribute("displayName","DisplayName")
                    user.update_attribute("initials","Initial")
                    if(Email !='Null'):
                        user.update_attribute("mail","Email")
                    #flash("Attributes updated",'success')
                    return "user created successfully" + "<b><a href = '/user_creation'>click here to return to Input page</a></b>"
                else:
                    return "Some error " +  "<b><a href = '/user_creation'>click here to return to Input page</a></b>"

When i enter OU name in field, am getting below error:
Appreciate help on th
Error:_ds = self.adsi_provider.getObject('', "LDAP:
File "<COMObject ADsNameSpaces>", line 2, in getObject
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, None, None, None, 0, -2147221020), None)