Added special characters text

Author: rolyon

articles/active-directory/fundamentals/custom-security-attributes-overview.md

@@ -149,8 +149,8 @@ Here are some of the limits and constraints for custom security attributes.
 > | Predefined values per attribute definition | 100 |  |
 > | Attribute value length | 64 | Unicode characters |
 > | Attribute values assigned per object | 50 | Values can be distributed across single and multi-valued attributes.<br/>Example: 5 attributes with 10 values each or 50 attributes with 1 value each |
-> | Characters **not** allowed for:<br/>Attribute set name<br/>Attribute name | ``<space> ` ~ ! @ # $ % ^ & * ( ) _ - + = { [ } ] \| \ : ; " ' < , > . ? /`` | Attribute set name and attribute name cannot start with a number |
-> | Characters allowed for attribute values (when used with blob index tags) | `<space> + - . : = _ /` | If you plan to use [attribute values with blob index tags](../../role-based-access-control/conditions-custom-security-attributes.md), the listed characters are allowed for blob index tags. If you don't plan to use attribute values with blob index tags, most special characters are allowed. For more information, see [Setting blob index tags](../../storage/blobs/storage-manage-find-blobs.md#setting-blob-index-tags). |
+> | Special characters **not** allowed for:<br/>Attribute set name<br/>Attribute name | ``<space> ` ~ ! @ # $ % ^ & * ( ) _ - + = { [ } ] \| \ : ; " ' < , > . ? /`` | Attribute set name and attribute name cannot start with a number |
+> | Special characters allowed for attribute values (when used with blob index tags) | `<space> + - . : = _ /` | If you plan to use [attribute values with blob index tags](../../role-based-access-control/conditions-custom-security-attributes.md), these special characters are also allowed for blob index tags. If you don't plan to use attribute values with blob index tags, most special characters are allowed. For more information, see [Setting blob index tags](../../storage/blobs/storage-manage-find-blobs.md#setting-blob-index-tags). |
 
 ## Custom security attribute roles