The rules size limit for mailboxes in Exchange Server 2007/2010 has a default size of 64 KB per mailbox.
The total rules size limit is customisable and can be increased up to a maximum of 256 KB per mailbox.
Open Windows PowerShell as Administrator.
Get the current rules quota for a mailbox:
[PS]> Get-Mailbox [email protected] | FL displayname, rulesquota DisplayName : Sandy RulesQuota : 64 KB (65,536 bytes)
Set the rules quota to its maximum size available, 256KB:
[PS]> Set-Mailbox [email protected] -RulesQuota:256kb
Check the new rules quota:
[PS]> Get-Mailbox [email protected] | FL displayname, rulesquota DisplayName : Sandy RulesQuota : 256 KB (262,144 bytes)
More info can be found here: https://support.microsoft.com/kb/886616
You don’t bother to explain that Get-Mailbox isn’t automatically available in Powershell, even as Administrator. This detail might be really useful.
I honestly don’t remember whether Get-Mailbox was available by default or not. I don’t have Exchange 2010 anymore and cannot easily verify this, therefore you may be right.
You should be running Exchange Management Shell instead of Powershell.
Get-mailbox exists on EMS on Exchange 2010 by default.
I don’t have Exchange 2010 anymore, but thanks for your feedback!