Incorrect.
"Service Impact: Subscribers may experience delays in sending or receiving messages, roaming in another location, or using other services such as Internet browsing or instant messaging. Subscribers may also be unable to create new accounts, integrate third-party email accounts, or use BlackBerry subscriber web sites. Devices may not receive new service books. BlackBerry-enabled devices that request a new PIN may not receive a PIN. BlackBerry Enterprise Servers may be unable to connect to the BlackBerry Infrastructure. Wireless service providers and device resellers may experience delays in using BlackBerry administration web sites, creating subscriber accounts, or provisioning services for subscribers."
Note: Further BES SRP connectivity may be impacted if your ISP routes with Seacom, pending your ISP's backup strategy, you may see intermittent concerns.