How to Enable circular logging on Exchange 2007 and 2010

The exchange logs can to take up a fair amount of space. In order to minimise the log sizes you can enable circular logging. there are warnings here about why you shouldn’t related to incremental backups not working etc. http://msdn.microsoft.com/en-us/library/aa579094(v=exchg.140).aspx If you want to enable circular logging any way Open exchange management console Organisation configuration.

Mailbox sizes missing from system manager on exchange 2007 2010

for some mysterious reason Microsoft has chosen to remove the convenience mailbox size you from the exchange system manager on exchange 2007 and exchange 2010. In order to get the statistics and port them to a text file Open exchange management shell Copy and paste the command: Get-MailboxStatistics | Sort-Object TotalItemSize -Descending | ft DisplayName,@{label=”TotalItemSize(KB)”;expression={$_.TotalItemSize.Value.ToKB()}},ItemCount.

Exchange 2007 or 2010 stopping NDR from postmaster@ filling queues from backscatter spam

If you find your queues are getting full of NDRs from the postmaster to spammers you can turn off allow non-deliveyr reports in the Hub transport\remote domains\default\properties This however will stop NDRs from being generated that are valid. You may therefore want to configure anti spam filtering If running a single exchange server with hub.