Update Set-AtpPolicyForO365.md

BlockUrls updates

Author: chrisda

exchange/exchange-ps/exchange/Set-AtpPolicyForO365.md

@@ -93,15 +93,13 @@ Accept wildcard characters: False
 ```
 
 ### -BlockUrls
-**Note**: The functionality of this parameter is being replaced by the \*-TenantAllowBlockListItems cmdlets. This parameter now only supports the removal of blocked URLs. Use the \*-TenantAllowBlockListItems cmdlets to add and remove blocked URLs.
+**Note**: The functionality of this parameter has been replaced block entries for URLs in the Tenant Allow/Block List using the \*-TenantAllowBlockListItems cmdlets. This parameter now supports only the removal of entries from the list.
 
 The BlockUrls parameter specifies the URLs that are always blocked by Safe Links in email messages and Safe Links for Office 365 apps.
 
-To enter multiple values and overwrite any existing entries, use the following syntax: `Value1,Value2,...ValueN`. If the values contain spaces or otherwise require quotation marks, use the following syntax: `"Value1","Value2",..."ValueN"`.
+To remove one or more values without affecting any existing entries, use the following syntax: `@{Remove="Value1","Value2"...}`.
 
-To add or remove one or more values without affecting any existing entries, use the following syntax: `@{Add="Value1","Value2"...; Remove="Value3","Value4"...}`.
-
-For details about the entry syntax, see [Entry syntax for the "Block the following URLs" list](https://learn.microsoft.com/microsoft-365/security/office-365-security/safe-links-about#entry-syntax-for-the-block-the-following-urls-list).
+To remove all existing entries, use the value `$null`.
 
 ```yaml
 Type: MultiValuedProperty