Exchange 2013 increasing rules quota

To set the rules quota to 256kb for the user dummy run
[PS] C:\>get-mailbox dummy|set-mailbox -rulesquota 256kb
To make sure that the user has got the new rules size run
[PS] C:\>get-mailbox dummy|fl rulesquota
It should return
RulesQuota : 256KB
To set the quota for all users run
[PS] C:\>get-mailbox|set-mailbox -rulesquota 256kb
To get the quota of all users run
[PS] C:\>get-mailbox|fl rulesquota, alias