Some rules are disabled, and you receive an error message when you try to create or enable rules in Outlook

If your mailbox is on Exchange Server 2007 or later, you can ask your Exchange administrator to increase the rules quota for your mailbox. 

The following example command sets the rules quota to the maximum value of 256 KB.

Set-Mailbox john@contoso.com -RulesQuota:256kb

The following example command allows you to view the current rules quota for a mailbox.

Get-Mailbox john@contoso.com |FL displayname, rulesquota