Here is more info, starting from zcb 5.0.19, please follow steps below to change windows password. For all versions of zcb prior to 5.0.19, please find list of steps in initial description of
Bug 36964 – Password change for windows and bb services breaks ZCB/Bes Sync.
-Stop BB controller.
-Change current user’s windows password.
-Change logon password for all of the BB related windows services
-Restart OS.
-Stop BB controller
-Go to ‘mail profiles’. Open up properties of
“BlackBerryManager” profile and proceed to “Zimbra Server Configuration
Settings” panel. Please enter correct admin password on this panel, hit <ok>
to make sure that connection to Zimbra server succeeded
-Repeat procedure described on previous step for 'BlackBerryServer' profile
-Start BB controller
-Verify that email service is restored