the /PCE switch is the quickest way I can think of.
You can use the three switches at once (no need to separate the switches by spaces and extra slash, just use /PCE or /CPE or any combination :-) ), it works.
I used the switches, however Tier 3 support from McAfee, as well as the actual documentation for cmdupdate clearly state that you cannot use them on one command line like:
/c /p /e
I just used a batch file instead to run each one separately with a delay in between each command.
Please submit a PER (product enhancement request) to take note of your requirement for having the /agentpolicy switch functioning with future agent releases.
Please refer to KB72145 for details on the issue and link to submit a PER.
The Kb you are referring to is KB52707
IMPORTANT: Use only one switch per command. Do not run a command with multiple switches. For example, CmdAgent.exe /P /E /C. This can launch multiple concurrent Agent-to-Server communications and can cause policy errors.
I can tell you I've been using this method since ePO 4.0 (especially handy for a first debug by help desk personel that get calls) and haven't had any issues. If the batch file works for you with 3 separate commands, that's great too.