Symptoms
A customer created Exchange mailbox info@customer.com in their POA Control Panel with the following limits:
Issue warning at 1024 MB
Prohibit send at 1024 MB
Size limit1024 MB
However, on Exchange server the parameter 'ProhibitSendQuota' was set to 1536 MB, not to 1024 MB as set by the value of the 'Prohibit send at' parameter.
Also, the parameter 'ProhibitSendReceiveQuota' was set to the value 1843MB which is higher than customer set as the value of the parameter 'Size limit' (1024MB).
The actual values of mailbox parameters on Exchange mailbox server may be seen with the help of the Get-Mailbox cmdlet in the Exchange Management Shell:
C:\> Get-Mailbox -Identity info@customer.com | fl ProhibitSendQuota, ProhibitSendReceiveQuota
ProhibitSendQuota: 1536 MB (1,610,612,736 bytes)
ProhibitSendReceiveQuota : 1843 MB (1,932,735,283 bytes)
POA used the following request to the Provisioning Engine (MPS or WPE) to create the Exchange mailbox in question, the limits in the request are higher that a customer configured in POA Control Panel:
<issueWarningQuota>1048576</issueWarningQuota>
<maxReceiveSize>10240</maxReceiveSize>
<maxSendSize>10240</maxSendSize>
<prohibitSendQuota>1572864</prohibitSendQuota>
<prohibitSendReceiveQuota>1887232</prohibitSendReceiveQuota>
<recipientLimits>100</recipientLimits>
<user>LDAP://CN=John Doe,OU=S001000101,OU=Provider,OU=Hosting,DC=hosting,DC=local</user>
Cause
POA takes into account not only the value of the parameter 'Prohibit send at' which may be managed by a customer in Control Panel, POA also takes into account the following parameters which may be set by the Provider in the corresponding Service Template:
- Guard space for the "Prohibit send" mailbox limit (in percents)
The percentage by which the "Prohibit send" limit configured on a mailbox can exceed the "Prohibit send" limit configured in POA. Negative percentage means there is no "Prohibit send" limit on a mailbox.
- Guard space for the "Prohibit send and receive" mailbox limit (in percents)
The Percentage by which the "Prohibit send and receive" limit configured on a mailbox can exceed the "Size" limit configured in POA. Negative percentage means there is no "Prohibit send and receive" limit on a mailbox.
So, the parameter 'Guard space for the "Prohibit send" mailbox limit' is set to 50% and the parameter 'Guard space for the "Prohibit send and receive" mailbox limit' is set to 80% in the Service Template the customer's subscription is based on. As a result POA configures 50% and 80% higher limits on Exchange side than customer set in Control Panel.
Resolution
Set the above mentioned guard parameters in Service Template to 0 if you want that POA create mailboxes in Exchange exactly with the limits which customer set in POA Control Panel.
Note: for the existing mailboxes new value of the guard parameters will not be applied automatically. It will be applied for newly created mailboxes only. In order to apply the new value for the existing mailboxes one may edit mailbox size manually in POA Control Panel and quota will be re-calculated in Exchange.