If you choose no then you dont need to do nothing

If you choose Yes then you need to edit the .htaccess

I have added the ReWrite rules to .htaccess in the root of our WHMCS install but the rules are being ignored - so all related links are giving a 404 error.

ANSWER: If Friendly URLs is enabled, the rules need to go before these in the existing .htaccess otherwise they get ignored.

here what you need to add

# Refer A Friend
RewriteRule ^refer/([0-9]+)$ ./index.php?m=refer&id=$1 [L,NC]
RewriteRule ^refer-a-friend/$ ./index.php?m=refer&a=page [L,NC]
RewriteRule ^refer-a-friend$ ./index.php?m=refer&a=page [L,NC]

As a result, we would like to share information with you on our St. Patrick's Day Special that are available with WHMCS Services

WHMCS Services is offering spectacular St. Patrick's Day Specials - all WS Modules will be discounted at an unbelievable rate of 20%. That is right, you heard right - 20% discount on all WS Modules, and enter a special code, Patrick20, and you will automatically get 20% off list price.

How Long Will this Sale Last?
Expires March 20th, 2020

Do You Need Custom Development?
Don't hesitate any longer! Contact us now!

Chat with us through live support; or send in a ticket if you would like more information. There you will find all your questions answered.

Here is a list of our various software products: Here

We would like to thank our members, whose efforts over the years have made this translation what it is.

German: Sascha Neumann
Italian: Mike Hur

We would like to thank our members, whose efforts over the years have made this translation what it is.

German: Sascha Neumann

1) WS Affiliates Plus
2) WS Agree terms
3) WS SMS Manager
4) WS Client Notification
5) WS GDPR Tools
6) WS Refer A Friend
7) WS Email 2FA
8) WS Server Monitoring
9) WS Email Verification Pro
10) WS Client Limitation

https://www.whmcsservices.com/top10.php

We would like to thank our members, whose efforts over the years have made this translation what it is.

Portuguese-pt: Liliana Oliveira
German: Alfred Pogner

Hi WHMCS Service,

There are some bugs existing in Client Username's module:

1. If we inspect website (F12), remove "disabled" in the username field, then user can edit their username whatever we allow them or not.
2. If clients update their information with username field disabled, then their username will be changed to blank

Two bugs are very critical. Please fix it soon as possible,

Thanks,

We recommend moving data writeable directories to a non-public location to prevent web-based access.
Edit the config.php file and specify the path to the new location by adding a new line:

$ws_upload_folder = "/home/user/newfoldername/";

01. GDRP Tools
02. Cancel Invoices
03. Support Pin
04. Services Fee
05. Auto Product Upgrade
06. Server Monitoring
07. SMS Manager
08. Client Notification
09. Email Verification
10. Refer A Friend


https://www.whmcsservices.com/top10.php

PHP 7.2 & 7.3
Ioncube Loaders v 10.x
WHMCS 7.9.x, & 7.10 supports 2.0.0

While these are the minimum requirements, we strongly recommend using the latest available, stable releases of all software and extensions.