diff --git a/lam/lib/account.inc b/lam/lib/account.inc
index 8a4e6a06..09d0a1bc 100644
--- a/lam/lib/account.inc
+++ b/lam/lib/account.inc
@@ -470,10 +470,10 @@ function get_preg($argument, $regexp) {
 					$pregexpr = '/^[[:digit:]]*$/';
 					break;
 		case "UNC":			// UNC Path, e.g. \\server\share\folder\...
-					$pregexpr = '/^([\\\][\\\]([a-zA-Z0-9\\.-])+)([\\\]([[:alnum:]\\.\\ \\_-])+)+$/u';
+					$pregexpr = '/^((([\\\][\\\])|(%))([a-zA-Z0-9%\\.-])+)([\\\]([[:alnum:]%\\.\\ \\_-])+)+$/u';
 					break;
 		case "logonscript":	// path to login-script. normal unix file
-					$pregexpr = '/^(([\/])*([[:alnum:]\\.\\ \\_-])+([\/]([[:alnum:]\\.\\ \\_-])+)*((\\.bat)|(\\.cmd)|(\\.exe)))*$/u';
+					$pregexpr = '/^(([\/])*([[:alnum:]%\\.\\ \\_-])+([\/]([[:alnum:]%\\.\\ \\_-])+)*((\\.bat)|(\\.cmd)|(\\.exe)))*$/u';
 					break;
 		case "workstations":	// comma separated list with windows-hosts
 					$pregexpr = '/^(([a-zA-Z0-9\\.\\_-])+(,[a-zA-Z0-9\\.\\_-])*)*$/';