SEP 12.1 RU1 MP1 unamanged client does not allow more than 20 digits for LU Proxy Username
In SEP 12.1 RU1 MP1 unamanged client, click on "Change Settings", then click the "Configure Settings" button in "Client Management" section.
A new window will pop-up. Select the "LiveUpdate" tab and click on "Configure Proxy Options...".
Select "I want to customize my HTTP or HTTPS settings" and check "Authentication Required".
You will find out that the "User name" field is limited to 20 digits.
It could be great if this limit could be arised at least to 30 digits.