Removing %BRAND_BLACKBERRY_SHORT% removes %BRAND_RIM% access to your Office 365 account and disables %BRAND_BLACKBERRY_SHORT% ...

Removing %BRAND_BLACKBERRY_SHORT% removes %BRAND_RIM% access to your Office 365 account and disables %BRAND_BLACKBERRY_SHORT% for your company. 

If you have BlackBerry devices that use this service, the devices will no longer have access to Exchange Online services, and you will no longer be able to manage BlackBerry devices that currently use %BRAND_BLACKBERRY_SHORT%. Email messages will stop being delivered to these BlackBerry devices within 15 minutes of access removal.